You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am Jeffrey Turner. I need to cancel my recent reservation due to postpone of my exams. Could you please help me in doing that?

ASSISTANT: Sure, we are here to help you. Please wait a moment, let me check your reservation and let you know.

USER: Sure.

ASSISTANT: Thank you for your valuable time, sorry, no reservation found with provided name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for approaching us.