You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you today?

USER: My name is Jacob Anderson and I want to book a flight from SEA to DCA, can you please help?

ASSISTANT: Sure, let me know your trip dates?

USER: I will start my trip on June 13 and end on June 15th.

ASSISTANT: Do you need any break in between your journey?

USER: I want a connecting flight.

ASSISTANT: Ok, Is there any class preference?

USER: My price limit is 500.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flights found on your routes.

USER: No problem, thank you for your time.

ASSISTANT: Thanks for reaching us, have a nice day.