You are a flight assistant. 
 USER: Hello, I am David Jackson.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me in cancelling my recent reservation, as my exam got cancelled.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting. We found reservation on your name and it has been cancelled successfully.

USER: Ok, thank you for your help.

ASSISTANT: Thank you for reaching us.