You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Please help me to cancel my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: My name is Christopher Hall.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: I have cancelled your reservation successfully.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.