syukuhakuentyou wo onegaisi, kyanserumati wo suru.

宿泊延長 is a compact, noun-style expression meaning extension of stay / extending the stay. Japanese often uses this kind of kanji compound in formal, written, or business-like contexts.

Compare:

• 宿泊延長をお願いする = request a stay extension
• 宿泊を延長してもらうようお願いする = a more fully verbal version

The compound version sounds shorter and more administrative, like something you might see in a hotel note, form, or staff communication.

Because 宿泊延長 is being treated as the direct object of お願いし.

So:

• 宿泊延長をお願いし = request an extension of stay

Here, お願いする can mean to request or to ask for, and the thing being requested takes を.

お願いし is the continuative / conjunctive stem of お願いする. It connects this action to the next one.

So:

• お願いし、キャンセル待ちをする。
  = request an extension, and go on the cancellation waiting list

It is related to お願いします, but they are used differently:

• お願いします = a complete polite sentence/expression
• お願いし、… = a connected form used before another action

In other words, し here is not sentence-ending politeness; it is linking one action to the next.

The comma helps show that the sentence contains two linked actions:

1. 宿泊延長をお願いし
2. キャンセル待ちをする

It makes the pause and structure clearer in writing. It is especially common in formal or note-like Japanese.

Without the comma, the meaning would still be understandable, but the comma makes the sequence easier to read.

キャンセル待ち means waiting for a cancellation—in other words, being on a waiting list in case someone cancels.

It is very common in places like:

• hotels
• restaurants
• events
• transportation reservations

So in this sentence, it means the speaker will ask to be put on the waiting list if a room becomes available through cancellation.

Good question. Both patterns exist in Japanese:

• 名詞をする
• 名詞する

But they are not always equally natural with every noun.

Here, キャンセル待ちをする is natural because キャンセル待ち is treated as an action/activity:
to do cancellation waiting = to go on the waiting list

This kind of noun + を + する pattern is very common:

• 勉強をする
• 予約をする
• 相談をする
• キャンセル待ちをする

So this sentence is using a very normal pattern.

Yes, it strongly suggests a sequence:

1. first, request an extension of the stay
2. then, go on the cancellation waiting list

The -し form here links the first action to the next one, so it often gives the feeling of and then or and.

That said, it does not always emphasize strict timing as strongly as English might. It mainly shows that both actions are part of the same plan or procedure.

It sounds formal and note-like, but not like full conversational polite Japanese by itself.

Why?

• It uses compact nouns like 宿泊延長
• It uses connected written style: お願いし、…する
• It ends in dictionary form する, not します

So it feels like something you might see in:

• a memo
• a procedure list
• staff notes
• a written summary of actions

If you wanted to say it politely in conversation, you might say something more like:

• 宿泊延長をお願いして、キャンセル待ちをします。

Both are possible, but they feel slightly different.

• お願いして、キャンセル待ちをする = more neutral and common in speech
• お願いし、キャンセル待ちをする = more formal, written, concise

The -し form can sound stiffer and more literary or businesslike than -て. In this sentence, that matches the compact overall style.

Yes, お願いする can mean both depending on context:

• request something
• ask someone to do something

In this sentence, because the object is 宿泊延長, the meaning is request an extension of stay.

It does not mean ask someone to extend in a grammatically explicit way, even though that idea is implied in real life. The sentence focuses on the request itself, not on the staff as grammatical subject/object.

Yes. Japanese often omits the subject when it is understood from context.

Possible implied subjects include:

• I
• we
• the guest
• the customer

So the sentence could be understood as something like:

• (I will) request a stay extension and go on the cancellation waiting list.

The exact subject depends on the surrounding context.

Yes, very much so. It has the feel of a procedural step or action memo.

For example, it could appear in:

• a travel plan
• hotel front desk notes
• a to-do list
• a customer service record

Because of the concise style, it may sound less like spontaneous speech and more like written action summary:

• Request stay extension; join cancellation waitlist.

That is one reason the wording feels a little compressed compared with everyday conversation.