You are a flight assistant. 
 USER: Hello. I am John Williams.

ASSISTANT: Hello, how may I be of your help?

USER: I want to cancel my recent reservation as I met with an accident, help me in cancelling my reservation.

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Sure.

ASSISTANT: Thank you for your time. There is no reservation found according to your name.

USER: Its ok, thank you.

ASSISTANT: Thank you for picking us.