You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to ABC flight booking agency.

USER: My exams have postponed suddenly due to heavy rains so, I want to cancel my reservation. Can you help me with this?

ASSISTANT: Sure, I will help you with cancelling your reservation. May I know your good name for checking whether the reservation has existing or not?

USER: Yes, Debra Hernandez.

ASSISTANT: Ok, please be hold on for a while, I will inform you very soon.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry Debra, I did not came across your name in the reservation list to cancel your reservation.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Most welcome. Thank you for choosing us. Have a great day.