You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: I can help you, can I know your name?

USER: Sure, Deborah Nelson here.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry Nelson, there is no active reservation found with your name.

USER: Oh, it's very sad to hear from your side. Thanks for the information.

ASSISTANT: My pleasure.