You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Due to heavy rainfall in JFK, I want to cancel my reservation.

ASSISTANT: Can you tell me your name please?

USER: I am Sharon Jones.

ASSISTANT: Let me check weather your reservation existed or not.

USER: Ok.

ASSISTANT: Sorry Jones, no reservation found by your name.

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

ASSISTANT: Thank you for contacting us, have a nice day.