You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Margaret Harris.

ASSISTANT: How may I assist you?

USER: I had planned to meet my friend, but it was cancelled.Can you cancel my recent reservation?

ASSISTANT: Sure, wait for a minute.

USER: Sure.

ASSISTANT: Sorry Harris, no reservation found on your name.

USER: That's Ok. Thank you for your help.

ASSISTANT: Thank you for approaching us.