rinzibin no kyanserumati wo suru.

臨時便 means an extra, special, or temporary service that is added outside the regular schedule.

• 臨時 = temporary / special / extra
• 便 = a transport service such as a flight, bus, train service, ferry, etc.

So in this kind of sentence, 臨時便 usually means something like an extra flight or special service.

The の connects two nouns:

• 臨時便
• キャンセル待ち

So 臨時便のキャンセル待ち means the cancellation waitlist for the extra flight/service.

A good way to think about it is:

• A の B = B of/for A

Here, it is not saying the extra flight waits for cancellation. It means the waitlist related to the extra flight.

キャンセル待ち is a noun meaning waiting for a spot to open because of someone else’s cancellation.

It is very common in reservation contexts such as:

• flights
• hotels
• events
• restaurants
• classes

So it is basically a waitlist due to cancellations or standby for a canceled reservation slot.

Also, even though it contains 待ち (waiting), the whole expression works as one set noun.

In Japanese, many nouns can combine with する to make a verbal expression.

So:

• キャンセル待ち = the noun waitlist / waiting for a cancellation
• キャンセル待ちをする = to go on the waitlist / to wait for a cancellation opening

The particle を marks キャンセル待ち as the thing being done.

This pattern is very common:

• 勉強をする = to study
• 予約をする = to make a reservation
• キャンセル待ちをする = to go on a cancellation waitlist

Yes. In modern Japanese, especially in casual speech and everyday writing, キャンセル待ちする is also natural.

So both are possible:

• キャンセル待ちをする
• キャンセル待ちする

The version with を can feel a little more explicit or textbook-like. The version without を is very common in real usage.

Because 臨時便 is not directly attached to the verb here. It is modifying the noun キャンセル待ち.

The structure is:

• 臨時便のキャンセル待ち = the cancellation waitlist for the extra flight
• then をする = do that / go on it

So the sentence is built as:

• [noun phrase] + をする

If you used に, it would be a different structure and would not sound as natural here.

No. 便 is used for various kinds of scheduled transport or delivery services.

For example, it can refer to:

• airplane flights
• bus services
• ferry services
• delivery/mail services

However, in many travel-related contexts, learners often first meet it with flights. The exact meaning depends on context.

It is read:

りんじびん の キャンセルまち を する

More precisely:

• 臨時便 = りんじびん
• キャンセル待ち = キャンセルまち
• をする = をする

A common point to notice is that 便 here is read びん, not べん.

Yes, it can be a complete sentence in Japanese, especially in dictionary form or as a written note.

Japanese often omits the subject when it is obvious from context. So this could mean things like:

• I will go on the waitlist for the extra flight.
• To go on the waitlist for the extra flight.
• Go on the waitlist for the extra flight.

Which one it feels like in English depends on the situation. In isolation, する is the plain dictionary form, so it often appears in:

• lists
• instructions
• notes
• plain-style statements

The structure is:

• 臨時便 = extra/special flight or service
• の = links nouns
• キャンセル待ち = cancellation waitlist
• を = marks the object
• する = to do

So the full pattern is:

[transport/service] の [waitlist] を する

In other words:

to do the cancellation-waiting for the extra flight
which naturally becomes
to go on the waitlist for the extra flight.