You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Matthew Johnson. I want to cancel my recent reservation due to cancel of my exam. Could you please help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation on your name. Thank you so much for choosing us.

USER: No problem, thank you for the information.