You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Alexander Smith.

ASSISTANT: How can I  help you?

USER: Can you please help me with cancelling my reservation?

ASSISTANT: Sure, I am happy to help you.

USER: Thank you.

ASSISTANT: Sorry for the trouble, there is no reservation found on your name in our database.

USER: It's ok fine, no problem.

ASSISTANT: Thank you for approaching us.

USER: Anyway, thank you for your time.