You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I want to cancel my recent reservation due to sudden change in my trip. Can you help me?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: May I know your name?

USER: I am Christopher Perez.

ASSISTANT: We found a reservation on your name. Shall I proceed with cancelling?

USER: Sure.

ASSISTANT: Your cancellation is done.

USER: Thank you for your help.

ASSISTANT: Thank you for doing that. Thank you for approaching us.