You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Owning to an emergency, I want to cancel my recent reservation.Can you help me?

ASSISTANT: May I know your name?

USER: Sure, I am Melissa Miller.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to cancel.

USER: That's fine, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.