You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I am John Allen, please cancel my reservation, which I have done with my name.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, I could not find any reservation with your name in our database.

USER: It's ok, thanks for your information.

ASSISTANT: Thanks for choosing us.