You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Myself Barbara Turner. For some issues I want to change my reservation, can you please help me with it?

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found basis on your details.

USER: It's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for the information.