You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my reservation, please help me with it.

ASSISTANT: May I know your name?

USER: I am Eric Thomas.

ASSISTANT: Ok., please wait  a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: Fine, Thanks for the information.

ASSISTANT: Thanks for reaching us, have a good day.