You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Please book a flight ticket from SFO to DCA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: My journey dates are Apr 13 and Apr 15.

ASSISTANT: Do you have any preferences about flight connections?

USER: I need a connecting flight.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: I am Rebecca Parker.

ASSISTANT: The Delta airlines providing an economy class flight with price 100 and the connections 1. Shall I confirm your ticket?

USER: Go ahead.

ASSISTANT: Your ticket is booked. The flight number is 1005.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.