You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you from flight booking agency?

USER: I am Carol Miller. I am planning a trip with my friend to visit Chicago.Can you please help me out to book a ticket from DCA to ORD?

ASSISTANT: Sure, I am here to help you. Carol Miller, can you please provide your journey dates to proceed further?

USER: I would like to travel on 11/17 and return on 11/19.

ASSISTANT: Wait a moment please.

USER: Make sure my connection limit is 1. Ok, take your own time.

ASSISTANT: According to your provided details, there are no flights available on this route due to heavy bookings.

USER: That's fine.

ASSISTANT: Thank you for utilising our services.

USER: Thank you for your help.