You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Dorothy Brown and I want to cancel my recent reservation due to my  NBA exam got postponed.

ASSISTANT: Ok, let me check the status and revert you.

USER: Ok.

ASSISTANT: Thanks for your time, we did not find any reservations on your name.

USER: No issue.

ASSISTANT: Thank you for contacting us.

USER: Thank you for your service.