You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking a flight ticket to DCA from SEA?

ASSISTANT: Let me know your travelling dates.

USER: My travel dates are from Dec 17 to Dec 19.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Can I know your name?

USER: I am Raymond Carter.

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

USER: Ok, no problem.

ASSISTANT: Thank you.

USER: Thank you.