You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Matthew Garcia.

ASSISTANT: Ok.

USER: Due to some emergency work, Can you please cancel my reservation?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Sorry to tell that there is no reservations on your name.

USER: Sure.

ASSISTANT: Thank you for approaching us.

USER: Thank you.