You are a flight assistant. 
 USER: Hello. I am Eric Harris.

ASSISTANT: Hello, how can I help you out?

USER: I would like to book a ticket to Boston, can you please help me in booking the ticket from DCA to BOS?

ASSISTANT: Sure, we are happy to help you. May I know your planned trip dates?

USER: Thank you. I am travelling on these dates June 15th and 17th.

ASSISTANT: Ok, do you need any break in between journey?

USER: I need a connection limit.

ASSISTANT: Is there any other specifications?

USER: I have price limit 200.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.