You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I met with an accident and doctor suggested me to take bed rest, so I am unable to travel the trip which I have planned in my weekend. Can you help me in cancelling my ticket booking?

ASSISTANT: Sure, may I know your travelling dates? May I know your name?

USER: Sure, my name is Sharon Green.

ASSISTANT: Sorry, there is no reservation found.

USER: Ok, that's fine, no problem with it.

ASSISTANT: Thank you for reaching us.