You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: I am Pamela Roberts and I want to cancel my reservation.

ASSISTANT: Please wait a moment. I will check and get back to you.

USER: OK.

ASSISTANT: Thanks for waiting. There is no reservation found on your name.

USER: OK, thank you  for the information.

ASSISTANT: Thank you for choosing us. Have a great day.

USER: Thank you.