חכי לי ליד הקופה; אני רוצה לדבר עם המוכר עוד דקה.

A simple transliteration is:

Chaki li leyad ha-kupa; ani rotze/rotza ledaber im ha-mocher od daka.

A few pronunciation notes:

• ח is the throaty sound like ch in German Bach or Scottish loch
• חכי = cha-KI
• ליד = le-YAD
• הקופה = ha-ku-PA
• לדבר = le-da-BER
• המוכר = ha-mo-CHER
• דקה = da-KA

Also, אני רוצה can be pronounced two ways:

• ani rotze if the speaker is male
• ani rotza if the speaker is female

The spelling is the same without vowel marks.

חכי is the command form wait! said to one female.

The verb is לחכות = to wait.

Imperative forms:

• חכה = wait! to one male
• חכי = wait! to one female
• חכו = wait! to more than one person

So this sentence is addressed to a girl or woman.

Yes, לי literally means to me, but with the verb לחכות Hebrew uses ל־ for the person you are waiting for.

So:

• חיכיתי לך = I waited for you
• תחכה לי = wait for me
• חכי לי = wait for me

This is just the normal Hebrew pattern, even though English uses for instead of to.

ליד means next to, beside, or by.

So ליד הקופה means by the register/check-out counter or next to the checkout.

Examples:

• ליד הדלת = by the door
• ליד הבית = next to the house
• ליד הקופה = by the cash register / checkout

The ה־ at the beginning is the Hebrew definite article, meaning the.

So:

• קופה = a register / a checkout / a cash desk
• הקופה = the register / the checkout

In this sentence, the speaker means a specific place, so הקופה is natural.

Also, קופה can mean slightly different things depending on context:

• in a store: cash register / checkout
• in some contexts: box office or fund

Yes, Hebrew often can leave it out in the present tense if the meaning is clear.

So both of these can work:

• אני רוצה לדבר עם המוכר עוד דקה
• רוצה לדבר עם המוכר עוד דקה

Including אני makes it a little clearer or slightly more explicit: I want to...

So here it is completely normal, but not absolutely required.

In unpointed Hebrew, רוצה can represent:

• rotze = masculine singular
• rotza = feminine singular

So אני רוצה לדבר can mean either:

• I want to talk said by a man
• I want to talk said by a woman

You only know from pronunciation, vowel marks, or context.

Because לדבר עם... means to speak/talk with...

So:

• לדבר עם המוכר = to talk with the seller/shop assistant

The preposition עם means with.

Examples:

• אני מדבר עם אמא = I’m talking with Mom
• היא דיברה עם המורה = she talked with the teacher

Also, המוכר is masculine singular:

• מוכר = male seller / salesman / shop assistant
• מוכרת = female seller / saleswoman / shop assistant

Here it means for another minute or one more minute.

Literally:

• עוד = more / another / still
• דקה = minute

So עוד דקה = another minute

In this sentence:

• אני רוצה לדבר עם המוכר עוד דקה = I want to talk with the seller for another minute

Important: עוד דקה can sometimes mean different things depending on context, such as in a minute or just a sec, but here the natural meaning is duration: one more minute.

Because Hebrew often expresses duration directly, without a preposition.

So Hebrew says:

• חיכיתי שעה = I waited an hour
• דיברנו שתי דקות = we talked for two minutes
• אני רוצה לדבר עוד דקה = I want to talk for another minute

English usually needs for, but Hebrew often does not.

It separates two closely connected parts:

• חכי לי ליד הקופה = Wait for me by the checkout
• אני רוצה לדבר עם המוכר עוד דקה = I want to talk with the seller for another minute

It shows that the second part explains the first. In everyday writing, many people would also use:

• a comma
• a period
• sometimes even no semicolon at all in casual writing

So the semicolon is correct, but it is mainly a punctuation choice, not a grammar rule.