You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Catherine Martin here. I want to cancel my recent reservation, will you help me out?

ASSISTANT: Sure, wait a moment.

USER: Ok.

ASSISTANT: There is a reservation has been found on your name. Please tell me details? Ok, your reservation has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.

USER: Welcome.