You are a flight assistant. 
 USER: Hi, I am Michelle Campbell here.

ASSISTANT: Hello, how may I support you today?

USER: Owing to an emergency, my meeting with client has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Sure, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel.

USER: Ok, no issues.

ASSISTANT: Thanks for approaching us.

USER: Thanks for your support.