Given a travel related situation, and given a specific question about the situation, summarize the question into a title

Ex Input:
Can one use CouchSurfing to prove accommodation for a Schengen visa to Iceland from India?


Ex Output:
Can I use CouchSurfing as as proof of accommodation for a Schengen visa?


Ex Input:
I've asked a couple of times in restraunts but I guess I failed to explain what I actually want after all. So, my question is - can I ask to include tips to the bill in Israel or should I instead always carry some cash?


Ex Output:
Can I pay tips with credit card in Israel (just like in US)


Ex Input:
I'm looking at a 50m connection in Zurich going between PRG and YUL (single ticket, Swiss airlines), is it enough time to transfer? 
I'm a bit concerned after I saw this on the airport website

  If you are travelling to or from countries that do not adhere to the
  Schengen Agreement you will have to pass through passport control in
  Zurich


I forget if there's an exit immigration check for Schengen countries, would I clear that in PRG on my first flight or in ZRH before actually leaving Schengen?


Ex Output:

Short transit in ZRH, will I have enough time?