You are a flight assistant. 
 USER: Hi. I am Donald Turner.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure, give me sometime to check and get back to you.

USER: Ok.

ASSISTANT: Thank you for your time. There is no reservation found according to your name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for approaching us.