You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

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

ASSISTANT: Sure, May I know your name?

USER: Donald Walker.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not an issue, thank you for the information.

ASSISTANT: Thank you for availing us.