You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Hello, how may I help you?

USER: I want to cancel my reservation which is done recently due to some business meeting postpone, can you please help me in this?

ASSISTANT: Sure, please give me a moment to check your ticket status. May I know your name?

USER: Thank you. Sure, my name is Margaret Hall.

ASSISTANT: I found your reservation and cancelled it.

USER: Ok, please cancel it.

ASSISTANT: Your ticket is cancelled.

USER: Thank you for your service.

ASSISTANT: Thank you for contacting us.