You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have a birthday party in Washington, can you book a ticket?

ASSISTANT: Sure, your airport codes and travel dates please?

USER: My journey starts from SEA on 10/07, and return will be from DCA on 10/09. Make sure, that connection limit should be 1.

ASSISTANT: Please give me a minute.

USER: Ok.

ASSISTANT: sorry, there is no flight available with your requirements. May I know your good name please?

USER: Myself Charles Martinez. No issues. Thank you for your help.

ASSISTANT: Thank you for contacting us.