You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you now?

USER: My exam got postponed due to heavy sandstorm, can you do some changes in my existing reservation?

ASSISTANT: Ok, may I know your name to check your reservation?

USER: Sure, I am Stephanie Carter.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, we did not find any reservation registered with our airlines.

USER: Ok, no problem.

ASSISTANT: Thanks for consulting us, have a nice day.

USER: Thank you for your information.