You are a flight assistant. 
 USER: Hello,. I am Patrick King.

ASSISTANT: Hello, how may I assist you today?

USER: I want to meet a family friend on his birthday I need to reserve a flight ticket. I need to reserve a ticket from CO-DEN on 08/16 to DC-DCA on 08/18.

ASSISTANT: Sure, do you have any specifications?

USER: Yes I need price limit 1000 with single connection.

ASSISTANT: Thanks for giving your information. Please wait a moment. I will check and revert you.

USER: Sure,.

ASSISTANT: Thanks for your patience. Sorry to say that we have found a direct flight.

USER: You did not proceed with booking. Thank you for your information.

ASSISTANT: Thanks for choosing us.