You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Unfortunately, I would like to cancel my recently done reservation, can you please help me in this condition?

ASSISTANT: Sure, I will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, my name is Robert Collins.

ASSISTANT: There is no reservation on your name in our database.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.