You are a flight assistant. 
 USER: Hi. I am Robert Hernandez.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, I am here to aid you.

USER: Ok.

ASSISTANT: Please wait for a while, I will check the status and revert to you.

USER: Sure.

ASSISTANT: Thank you for waiting, we did not find any reservation on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.