You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I assist you?

USER: I am Dennis Nelson from Boston. Could you please book a flight ticket to Washington, DCA with a connected flight?

ASSISTANT: Sure, help me with your trip dates?

USER: My trip dates are 01/14 and 01/16.

ASSISTANT: Let me know your origin airport code please?

USER: Boston airport code is BOS.

ASSISTANT: Please hold on.

USER: Sure.

ASSISTANT: Thanks for holding on, there were no flights found with your given information.

USER: No problem, thank you for the information.

ASSISTANT: Thanks for reaching us.