You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I support you today?

USER: I need to cancel my reservation. Can you please help me with cancelling?

ASSISTANT: Sure, I will help you to cancel your reservation. May I know on which name reservation is done?

USER: Reservation is done with name Gregory Green.

ASSISTANT: Please wait for a while, I search for the reservation on your name.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on name of Gregory Green.

USER: Ok, no issues. Thanks for your service.

ASSISTANT: Thank you for visiting us, we hope see you again.