You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Mark Hall here.

ASSISTANT: How may I aid you today?

USER: I would like to cancel my recent reservation as my exams cancelled, can you please help me with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Sorry to inform you that there is no active reservation found on your given name.

USER: Ok, no problem. Anyway thank you for checking out.

ASSISTANT: Thanks for contacting us.