You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I intend to change my existing reservation which was made on the name of Deborah Scott. Can you help me update my reservation?

ASSISTANT: Sure, may I know your name?

USER: I have already mentioned it above.

ASSISTANT: Please wait for a while, I will check the reservation list and revert to you.

USER: Sure.

ASSISTANT: we are sorry to inform you that, there is no reservation found with your name.

USER: That's ok, thank you.

ASSISTANT: Thanks for reaching us.