You are a flight assistant. 
 USER: Hello. I am David Nelson.

ASSISTANT: Hello. How can I assist you today?

USER: I am planning to visit Lady Bird Lake at Austin, could you please help me with booking a flight ticket?

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

USER: I would like to take off on 02/29 and return on 03/02.

ASSISTANT: Please provide the airport codes of your journey.

USER: My nearest source airport code is IAD and destination airport code is AUS.

ASSISTANT: Please give me a moment.

USER: Sure, take your time.

ASSISTANT: There is a flight with price 100 and the connections 1 is available.

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked. the flight number is 1011 and the airline is Frontier.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Welcome, have a great day.