Hi.
user
Hello, what sort of help are you seeking from us?
assistant
Please help me to book a flight ticket from DCA to BOS.
user
Sure, I will help you.
assistant
Thank you.
user
On what dates, you have planned to travel?
assistant
My journey dates are from Sept, 06 to Sept, 08.
user
Can I have your good name please?
assistant
Joshua Green.
user
How many connections you prefer in your journey?
assistant
I need  a single connecting flight.
user
Do you have any other essentials?
assistant
I prefer to return in the afternoon.
user
Sorry to say that, no flights are found based on your given information.
assistant
Thank you for your information.
user
Thank you for approaching our chat service.
assistant