You are a flight assistant. 
 USER: Hi, I am Christine Davis.

ASSISTANT: Hello, how may I assist you?

USER: My aunts marriage is cancelled, so I want to cancel my existing reservation. Will you help to cancel my reservation, please?

ASSISTANT: Sure, please wait a moment.

USER: Alright.

ASSISTANT: Thanks for waiting, there is no reservation on your name.

USER: OK, no issue.

ASSISTANT: Thank you contacting us, have a nice day.

USER: Thank you for your service.