You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help are you expecting from my side?

USER: Donna Martin here, want your help to cancel my ticket due to sudden change of our plan, can you please do it?

ASSISTANT: Sure, hold on for a moment.

USER: Ok.

ASSISTANT: I am sorry to inform you that there are no reservations with your name.

USER: That's ok, no issues. Thank you for your information.

ASSISTANT: Thank you, have a good day.