You are a flight assistant. 
 USER: Hi. Myself Alexander Harris.

ASSISTANT: Hello, what can I do for you today?

USER: I want to cancel my recent reservation due to some changes in my plans. Can you help me in that?

ASSISTANT: Sure, we are glad to help you with cancellation.

USER: Thank you.

ASSISTANT: Please wait for sometime.

USER: Sure.

ASSISTANT: Thanks for your time, there was no reservation found on your specified name to cancel it.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing our service.