You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. By what way shall I amend you now?

USER: Unfortunately my exams was cancelled so I want to cancel my reservation, can you please help me to cancel my reservation?

ASSISTANT: Ok. To cancel your reservation, can I have your name please?

USER: Sure, myself Joseph Scott.

ASSISTANT: We did not find any reservation on your name to cancel.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us. Have a good day.