You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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

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

USER: Sure, my travel dates are from July 31 to Aug 02.

ASSISTANT: Do you have any preferences about flight connections?

USER: I would prefer connecting flight for my trip.

ASSISTANT: Do you have any preferences about class?

USER: No.

ASSISTANT: Please mention your name.

USER: Myself Emily Walker.

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

USER: Ok, please confirm it.

ASSISTANT: Your ticket is booked. The flight number is 1007.

USER: Thank you for booking.

ASSISTANT: Welcome, have a great day.