You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to cancel my reservation because I have to prepare for my exam. Can you please help me out?

ASSISTANT: Sure, I am hear to help you. May I know your name? so that I can check in our list.

USER: My name is Thomas Robinson.

ASSISTANT: Give me a  minute.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found under this name.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for opting us.