You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: Can you please help me in booking my flight from SEA to reach DCA?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: Thank you, my travelling dates are Apr 27th and Apr 29th.

ASSISTANT: Can I know your name please?

USER: I am Kathleen Garcia.

ASSISTANT: Do you need any specifications?

USER: I prefer a flight which has maximum a single connection.

ASSISTANT: Can I know your other preferences?

USER: I want to return in the morning time.

ASSISTANT: Sorry, there  are no flights found.

USER: Ok, no problem. Thanks for the information.

ASSISTANT: Thank you for reaching us.