You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Alexander Turner. Can you help me in cancelling my reservation?

ASSISTANT: Sure, please wait for a moment to check your details.

USER: Ok.

ASSISTANT: No reservation found on your name. Sorry for inconvenience.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Welcome.