You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure, can I know your name?

USER: Mark Harris.

ASSISTANT: Please hold on a moment.

USER: Ok.

ASSISTANT: We found your reservation and cancelled successfully.

USER: Ok, thank you for the help.

ASSISTANT: Thank you for reaching us.