You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me to book a flight ticket from OAK to DFW?

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

USER: I want to fly on 27 Jan and return on 29 Mar.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Can you confirm your travelling dates please?

USER: Sorry, I want to fly on 27 Mar and return on 29 Mar.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Please mention your name.

USER: I am Justin Campbell.

ASSISTANT: The Spirit airline is providing an economy class flight with price 100 and the connections 0. Shall I confirm your ticket?

USER: Please proceed to booking.

ASSISTANT: Your ticket is booked. The flight number is 1027.

USER: Thanks for helping me.

ASSISTANT: Welcome, have a great day.