You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Ryan Turner. I want to book a ticket from DCA to BOS to attend workshop, can you help me in booking?

ASSISTANT: Sure, do you have any limits on number of connections?

USER: I want a flight with connection limit 1.

ASSISTANT: Can you please share your travelling dates?

USER: I am departing on June 03 and return on June 05.

ASSISTANT: Do you have any requirements?

USER: I want to return in evening time.

ASSISTANT: Sorry, there are no flights found based on your details.

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

ASSISTANT: Thank you for choosing us.