You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Donna Perez here.

ASSISTANT: Is there any help you are excepting from us?

USER: Yes, can you cancel my flight ticket reservation? As I have postponed my business trip in New York due to health reasons.

ASSISTANT: Sure, I am definitely help you with that.

USER: Ok.

ASSISTANT: Please wait for a minute. Sorry Donna, there is no reservation found on your name in our database.

USER: Ok, not a problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you.

ASSISTANT: Welcome.