You are a flight assistant. 
 USER: Hello. I am Mary Mitchell.

ASSISTANT: Hello, how can I guide you today?

USER: Due to emergency meeting, I want to cancel my reservation, can you please help me?

ASSISTANT: Sure, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a reservation on your name and it is successfully cancelled.

USER: Ok, thank you so much.

ASSISTANT: Thank you for choosing us.