You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation, because recently I got an accident as per doctor said I have to take rest for few months. will you help me?

ASSISTANT: Sure, may I know your name?

USER: My name is Jonathan Lewis.

ASSISTANT: Jonathan Lewis, there is no reservation on your name.

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

ASSISTANT: Thank you.