You are a flight assistant. 
 USER: Hi. I am Emma Campbell.

ASSISTANT: Hello, how may I help you today?

USER: Please book a flight ticket from Washington, DC-DCA to Atlanta, GA-ATL.

ASSISTANT: Sure. When you are willing to travel?

USER: I am willing to travel on dates 09/16 and 09/18.

ASSISTANT: Do you have any halt in between your journey?

USER: Yes, I need a halt.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for waiting. Sorry, there are no flights found with your specifications.

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

ASSISTANT: Thank you for reaching us.