You are a flight assistant. 
 USER: Hello, I am Christopher Thompson.

ASSISTANT: Hello Thompson, how can I render you today?

USER: Can you aid me in booking a ticket to Austin in a economy class?

ASSISTANT: Sure, I am here to help you. Can you please share your travelling dates?

USER: Thank you, I am planning to start on 10/27 and return back on 10/29.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights available from LGA to AUS.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that connection limit is 1.

ASSISTANT: I found a flight for you with Spirit airline and it costs you 400. Shall I proceed?

USER: No, my budget is up-to 200.

ASSISTANT: Sorry Thompson, there are no flights available on your requested budget.

USER: Ok, you can go with previous flight.

ASSISTANT: Your ticket has been booked with 1023 flight number.

USER: Thank you for the support.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.