You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Me and my friends planned a trip, but due to heavy rains in my destination place our trip got postponed. Can you please help me to change my reservation on the name of Patrick Young?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

ASSISTANT: sorry, we don't have any reservation with your name in our data base.

USER: That's Ok, thanks for your help.

ASSISTANT: Thank you.