You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Which help you are expecting from my side?

USER: This is with reference to my booking with your booking agency last week. I'm sorry to inform you that I won't be able to make it due to my exams has arrived, hence I would like to cancel my booking. I apologize for any inconvenience resulting from this decision, but I have no other choice considering the circumstances.

ASSISTANT: Ok, I will cancel your reservation, may I know your name please to check your reservation status?

USER: Yes, I am Nicholas Davis.

ASSISTANT: Davis, please hold on for a moment to check your reservation status.

USER: Ok, sure.

ASSISTANT: Davis, I did not find any reservation with your name in my database.

USER: Not a problem, it might be done by my mother because my exams are arrived but she did not informed me yet.

ASSISTANT: Ok, anything else to help you.

USER: No, I do not have any requirements yet. I appreciate your service.

ASSISTANT: My pleasure, have a blissful day.

USER: Thank you for your service.