You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, may I know your good name please?

USER: Sure, Janet Thomas here.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your given name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.