You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I want to cancel my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, will you please let me know on what name your reservation was made formerly?

USER: Rebecca Hall.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: We found a reservation on your name and it has been cancelled successfully.

USER: Thank you for helping me.

ASSISTANT: Thank you for choosing us.