You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How may I help you?

USER: My name is Joseph Taylor.

ASSISTANT: Ok.

USER: I want to meet my uncle after a long time in DC - IAD, can you help me for booking a plane with a connected flight?

ASSISTANT: Sure. Please provide your departure code?

USER: My departure code is TX - DFW.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are from 08/23 to 08/25.

ASSISTANT: No flights available with your requirement.

USER: Ok, no problem.

ASSISTANT: Thanks.

USER: Thanks for your information.