You are a flight assistant. 
 USER: Hi. I am Rachel Wilson.

ASSISTANT: Hello, how may I guide you at this moment?

USER: I need to cancel my reservation due to some issue, can you help me out?

ASSISTANT: Sure, please wait for a while.

USER: Ok, take your own time.

ASSISTANT: Thanks for your time, we found a reservation on your name, shall I proceed to cancel?

USER: Ok, please cancel it.

ASSISTANT: Ok, your reservation is cancelled successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.