You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. May I know your name?

USER: I am John Phillips.

ASSISTANT: How may I help you?

USER: My holiday trip is postponed, can you help me to cancel my reservation? Please, check the details.

ASSISTANT: Sure, please wait for a minute.

USER: Sure.

ASSISTANT: John, your reservation has been cancelled successfully.

USER: Thank you for your support.

ASSISTANT: Thanks for contacting us, have a great day.