You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to sudden postpone of my trip dates. Can you help me in doing that?

ASSISTANT: Sure, I can help you. May I know your good name please?

USER: Thank you. Dennis Wilson here.

ASSISTANT: Please wait for a while. Thanks for your time, there is no reservation found in your name.

USER: Ok, no issues. Thank you for your kind information.

ASSISTANT: Thank you for choosing us.