Если багаж не появится на ленте, я сразу пойду к сотруднику.

Because Russian normally uses the future after если when the condition is about a future situation.

In English, we say:

• If my luggage doesn’t appear, I’ll go...

But in Russian, both parts can refer to the future more directly:

• Если багаж не появится, я пойду...

Also, появится is perfective future, which fits well here because the speaker means a single completed event: whether the luggage shows up or doesn’t show up.

• появляется = appears / is appearing / appears regularly, more like present or habitual meaning
• появится = will appear / will show up once

So не появится means does not end up appearing / does not show up.

Russian aspect is doing important work here.

The verb pair is:

• появляться = imperfective
• появиться = perfective

In this sentence, the speaker is thinking about the result of a specific event:

• Will the luggage appear on the belt or not?

That is why Russian prefers the perfective:

• Если багаж не появится...

Perfective is common when you mean:

• a one-time event
• reaching a result
• completion

If you used the imperfective future, it would sound wrong or at least unnatural here, because the point is not an ongoing process of appearing, but the fact of whether it appears at all.

Пойду is the perfective future of идти in the sense of set off / go.

Here the speaker means:

• I’ll go (right away / I’ll head over)

That is a single action beginning at a specific moment, so пойти → пойду is very natural.

Compare:

• иду = I am going / I go
• буду идти = I will be walking / will be on my way
• пойду = I will go / I will set off

In this sentence, пойду fits best because the speaker is describing the decision to go to an employee immediately after the luggage fails to appear.

К means to / toward a person or place, and it requires the dative case.

So:

• сотрудник = nominative
• сотруднику = dative

That is why the sentence has:

• пойду к сотруднику = I’ll go to an employee / member of staff

This construction is used when you are going to a person in order to speak to them or approach them.

Some examples:

• подойти к врачу = to go up to the doctor
• обратиться к менеджеру = to turn to the manager
• пойти к сотруднику = to go to a staff member

At the airport, лента means the baggage belt / conveyor belt / carousel belt.

The phrase на ленте literally means on the belt.

Grammatically:

• лента = nominative
• на ленте = prepositional case after на when talking about location

So:

• на ленту = onto the belt (direction)
• на ленте = on the belt (location)

Here it is location, so:

• Если багаж не появится на ленте...

No—this is actually very similar to English.

Багаж is usually a mass noun, like luggage in English. Even if it refers to multiple bags, Russian often keeps it singular:

• багаж = luggage / baggage

So the sentence does not need a plural noun to mean all your bags.

If you wanted to talk about individual suitcases, you could use words like:

• чемоданы = suitcases
• сумки = bags
• вещи = belongings

But багаж is the normal airport word.

Russian often leaves out possessive words like my when the meaning is obvious from context.

At baggage claim, if someone says:

• Если багаж не появится на ленте...

it is naturally understood as my luggage / our luggage / the luggage we are waiting for, depending on context.

You could say:

• Если мой багаж не появится на ленте...

But it is not necessary unless you want extra clarity or emphasis.

This is very common in Russian: possession is often implied rather than spelled out.

Yes. That is also correct.

Russian word order is more flexible than English, because grammar is shown by endings as well as position. Both of these are fine:

• Если багаж не появится на ленте, я сразу пойду к сотруднику.
• Я сразу пойду к сотруднику, если багаж не появится на ленте.

The difference is mostly about emphasis and flow.

The original version starts with the condition:

• If the luggage doesn’t appear...

The second version starts with the main action:

• I’ll immediately go to a staff member...

So the choice depends on what you want to highlight first.

Сразу means immediately / right away.

So:

• я сразу пойду к сотруднику = I’ll go to a staff member right away

If you remove it:

• я пойду к сотруднику

the sentence still works, but it loses the sense of immediate reaction.

Related words and phrases:

• сразу = immediately
• сразу же = immediately / right away, slightly more emphatic
• тут же = right then and there
• немедленно = immediately, more formal or stronger

Сотрудник means employee / staff member. In this context, it sounds natural for airport staff.

It is a fairly neutral word. It does not specify the exact job, just that the person works there.

Possible alternatives:

• работник = worker, employee; can sound a bit less natural in this exact airport-help context
• сотрудник аэропорта = airport employee, more specific
• представитель авиакомпании = airline representative, if that is the person you mean

So к сотруднику is a good general choice when the speaker means a member of staff.

A helpful stress-marked version is:

Если бага́ж не появи́тся на ле́нте, я сра́зу пойду́ к сотру́днику.

Main stresses:

• Е́сли
• бага́ж
• появи́тся
• ле́нте
• сра́зу
• пойду́
• сотру́днику

A rough pronunciation guide:

• Если ≈ YES-lee
• багаж ≈ ba-GASH
• появится ≈ pa-YA-vee-tsa
• ленте ≈ LYEN-tye
• сразу ≈ SRA-zoo
• пойду ≈ pay-DOO
• сотруднику ≈ sa-TROOD-nee-koo

The ё sound is not present here, but do remember that unstressed о often sounds closer to a in normal speech, which is why сотруднику may sound more like sa-TROOD-... than so-TROOD-....

Yes, if you specifically mean a female staff member.

• к сотруднику = to a male employee / to an employee (generic masculine)
• к сотруднице = to a female employee

In many contexts, masculine singular in Russian can be used generically when the person’s gender is unknown or irrelevant. That is why к сотруднику sounds normal here even if the speaker does not know who exactly they will speak to.

If you want to avoid specifying gender, you could also make the phrase more explicit:

• к сотруднику аэропорта
• к работнику стойки информации
• к сотрудникам аэропорта if you mean staff in general