You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.  What can I do for you today?

USER: Actually, I have done my reservation to Denver for my exams. Due to postponement of my exams I want to cancel my existing reservation.Can you please help me out?

ASSISTANT: Absolutely.  Could I get the name that the flight is booked under?

USER: Ok, myself Elizabeth King is my name.Please search my ticket on your database?

ASSISTANT: It looks like there is no reservation under that name.  Is there anything else that I can help you with today?

USER: No thanks, thank you for your information.

ASSISTANT: You're welcome. Have a nice day.