You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Jeffrey Johnson.

ASSISTANT: How can I help you now?

USER: Can you cancel my previous reservation?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Jeffrey, your reservation is successfully cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for approaching us, have a nice day.