You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Donna Roberts.

ASSISTANT: Yes, Donna.

USER: I want to cancel my reservation , can you help in that?

ASSISTANT: Sure, I am here to help you out. Please wait a moment. Sorry Donna, there is no reservation on your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.