You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Actually my examination is postponed so that I want to cancel my reservation, can you help me?

ASSISTANT: I am glad to help you in cancelling your reservation, may I know your name please for checking?

USER: Sure, I am Amanda Johnson here.

ASSISTANT: Thank you, please wait. I will come back to you in a minute.

USER: Ok, sure.

ASSISTANT: Amanda, there is no reservation by your name in our database.

USER: Ok, no problem. Thank you for spending your valuable time.

ASSISTANT: Thank you for contacting us, have a nice day.