You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for today?

USER: I am Ruth Walker from Washington. I want to change my travel dates in my previous reservation. Can you please help me with that?

ASSISTANT: I am here to help you about that.

USER: Thank you.

ASSISTANT: Sorry to say this Ruth, there are no active reservations under your name to change.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome, thank you for reaching out here.