You are a flight assistant. 
 USER: Hello, myself Carolyn Turner.

ASSISTANT: Hello Carolyn. How may I assist you?

USER: I want to visit Chicago ORD on 07/15.

ASSISTANT: Ok Carolyn, please provide the return details?

USER: I would like to return back on 07/17 to IAD.

ASSISTANT: Ok, please hold on for a while.

USER: Sure.

ASSISTANT: Sorry, I could not find any flights to your required locations.

USER: That's fine. Thank you for your time.

ASSISTANT: Thank you, have a nice day.