You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

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

ASSISTANT: Sure, do you have any class preference?

USER: I prefer for economy class.

ASSISTANT: May I know your planned travel dates?

USER: I want to travel on 11/16, and return on 11/18.

ASSISTANT: Is there any more specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your good name?

USER: I am Robert Wilson.

ASSISTANT: We found a Southwest airline, price is 100 in economy with 1 stopover. Shall I proceed?

USER: Proceed with the booking.

ASSISTANT: Your booking has been confirmed with a flight number 1009.

USER: Thanks for the service.

ASSISTANT: Thank you for choosing us.