You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

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: My name is Elizabeth Harris.

ASSISTANT: Wait a minute.

USER: Ok, take your time.

ASSISTANT: Sorry, we could not find any reservation on your name.

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

ASSISTANT: Thank you for choosing us.