You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Mark Smith.

ASSISTANT: How can I assist you today?

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

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

USER: My travelling dates are 09/21 and 09/23.

ASSISTANT: Please give me a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, there is a flight with price 200 and the connections 1 is available. Shall I confirm your ticket?

USER: Proceed with booking.

ASSISTANT: Your ticket is booked. The flight number is 1000 and the airline is UA.

USER: Thank you for your help.

ASSISTANT: Welcome, have a great day.