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

ASSISTANT: Hello, how can I aid you?

USER: I just want to cancel my recent reservation, can you please help me in that?

ASSISTANT: Sure, please wait a minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok, not a problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.