You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Angela Taylor here. I need to book a flight ticket from DCA to IAD. Can you please help in booking a flight?

ASSISTANT: On which dates you like to travel?

USER: My trip dates are from 12/06 to 12/08.

ASSISTANT: There is a single connection flight with 1100 fare, can I proceed for booking in Delta airlines?

USER: Ok, please proceed.

ASSISTANT: Your booking is done in 1012 flight.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.