You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you?

USER: I need to cancel my reservation due to my planned trip got cancelled. So please help me with cancelling my reservation.

ASSISTANT: Sure, I am here to help you. Please let me know your name.

USER: Thank you. Sure, myself Margaret Collins.

ASSISTANT: Ok, please wait a minute. Sorry for the trouble, there is no ticket booking found on your name.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: Most welcome. Thank you for reaching us.

USER: Most welcome.