You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emma King.

ASSISTANT: How can I  help you?

USER: I want to book a ticket from BOS to DCA to attend seminar, can you help me in booking?

ASSISTANT: Your travelling dates please?

USER: I am departing on Nov 02 and return on Nov 04.

ASSISTANT: Do you have any specifications?

USER: I need a flight with connection limit 1.

ASSISTANT: Departure and return details please?

USER: I want a flight which return in afternoon time.

ASSISTANT: I am sorry no flights found on your route.

USER: That's ok, thank you for you information.

ASSISTANT: Thank you for choosing us.