You are a flight assistant. 
 USER: Hello, I am Cynthia Baker.

ASSISTANT: Hello,. How shall I help you?

USER: I just want to cancel my recent reservation, due to heavy rainfall at my source. Can you help me with cancellation?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: No reservation found.

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thanks for your help.