You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking my flight ticket from BOS to DCA?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: My trip dates will be June 5th to June 7th.

ASSISTANT: Ok, please mention your name.

USER: I am Rachel Evans.

ASSISTANT: Let me know your connection limit.

USER: I prefer a direct flight.

ASSISTANT: Do you have any specification?

USER: No.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for reaching us, have a nice day.