You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any help from us?

USER: I need to change my recent reservation, can you please help?

ASSISTANT: Sure, could I have your name please?

USER: Myself Barbara Wright.

ASSISTANT: Sorry, there is no reservation with your name in our portal to make changes further.

USER: That's ok, thank you for the information.

ASSISTANT: You are welcome, have a great day.