You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Please book a ticket from Boston, MA-BOS to Washington DC-DCA.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates to book a flight ticket?

USER: My travel dates are from 04/28 to 04/30.

ASSISTANT: May I know your name?

USER: I am Christine Harris.

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

USER: Connections limit 1.

ASSISTANT: Ok, wait for some time I will check the availability of flights and get back to you.

USER: Sure.

ASSISTANT: Let me know your price limit?

USER: Price limit is 1000.

ASSISTANT: Thanks for waiting there is no flights found on your details.

USER: Thank you.

ASSISTANT: Thanks for choosing us.