You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please assist me with cancelling my booking today?

ASSISTANT: Sure, we are here to help you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: Ok, my name is Lisa Adams.

ASSISTANT: Sorry to inform you that there is  no active reservation on your given name.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thanks for contacting us.