You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I assist you today?

USER: I am Ruth Evans, can you change my earlier reservation? Because I have to go home, after a couple of days.

ASSISTANT: Sure, please be on hold. Let me check your existing reservation.

USER: Sure.

ASSISTANT: Thanks for holding on, we do not found any active reservation with your specified name.

USER: Ok, Thanks for the information.

ASSISTANT: Thanks for approaching us, we hope to serve you again.