You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I help you?

USER: I am Linda Young. I am planning to book a ticket to book a ticket from DFW to DCA. Can you please help em out?

ASSISTANT: Sure.

USER: I would like to travel on 08/20 and return back on 08/22.

ASSISTANT: Ok. Do you need a halt in between your journey?

USER: My connection limit is 0.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: That's fine.

ASSISTANT: Thanks.

USER: Thank you for your help.