Do not be awkward in front of the restaurant when waiters come to serve you. Learn below english conversation and you will feel more comfortable to handle the situation.
Example 1
Waiter : Excuse me, how many people?
You : Five, can we get a non-smoking section?
Waiter : Sure but there are few people ahead of you right now.
You : How long do we have to wait?
Waiter : Around five to ten minutes
Example 2
Waiter : How many do you have?
You
: Just two. Can we have a table outside?
Waiter : You may have to wait for a while.
You : For how long?
Waiter : Twenty minutes
You : Well, I think we'll try another place then. Thank you!