You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I address you?

USER: I am Robert Parker. I need to cancel my recent reservation due to postpone of my volleyball tournament. Could you please help me in doing that?

ASSISTANT: Sure, let me check the reservation list and revert you.

USER: Sure.

ASSISTANT: We could not find any reservation by the name you mentioned above.

USER: No worries, thank you for your information.

ASSISTANT: Thank you for reaching us.