You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can assist you today?

USER: Actually, I have done reservation to Denver for my exams.

ASSISTANT: That's fine.

USER: But, due to the postponement of the exam by the government.I want to cancel my reservation.

ASSISTANT: Ok, I will help you with cancelling your reservation.

USER: Thank you for considering my response.

ASSISTANT: Please be hold on for a minute, I will check whether the reservation is existing or not.

USER: Ok, fine.

ASSISTANT: May I know your good name for verification?

USER: Myself Frank Hernandez.

ASSISTANT: Sorry Frank, I did not came across your name in the reservation list to cancel your reservation.

USER: It's ok, thank you for your services.

ASSISTANT: Most welcome. Thank you for choosing us. Have a great day and all the best for your exams.

USER: You are welcome.