You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my recent reservation due sudden change in my trip.

ASSISTANT: Ok.

USER: Can you help me out in cancellation?

ASSISTANT: Sure. May I know your name?

USER: I am Alexander Lopez.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no issues. Thank you for kind response.

ASSISTANT: Thank you, Have a nice day!.