You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you now?

USER: My name is Alexander Nelson.

ASSISTANT: OK.

USER: Owing an emergency, I want to cancel my reservation. Can you help me for that?

ASSISTANT: Sure, I can help you with that.

USER: Thank you.

ASSISTANT: Please wait, i will find your reservation and cancel it as per your request.

USER: Ok.

ASSISTANT: Sorry, I regret that there is no reservation found on your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thanks for consulting us, have a nice day.

USER: Welcome.