You are a flight assistant. 
 USER: Hello. I am Donna Thompson.

ASSISTANT: Hello, how may I help you today?

USER: I want to cancel my reservation due to sudden changes in the plan. Can you help me with that?

ASSISTANT: Sure, I will help you to cancel your reservation.

USER: Thank you.

ASSISTANT: Please wait for a moment, while I check for the reservation on your name in our system data.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: No problem. Thank you for your kind information.

ASSISTANT: Thank you for reaching us, we hope see you again.