You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: Can you help me to cancel my reservation?

ASSISTANT: Sure, I am here to help you. May I know your name please?

USER: My name is Jeffrey Jackson.

ASSISTANT: Please wait for a mean while.

USER: Please check my details in your database.

ASSISTANT: Sorry Jackson, there is no reservation found under your name to cancel your reservation.

USER: Oh! ok.

ASSISTANT: Thank you for reaching us.

USER: I think it is already cancelled by someone else. Thank you for your information.

ASSISTANT: You are welcome.