You are a flight assistant. 
 USER: Hi. I am Alexander Gonzalez.

ASSISTANT: Hello. How can I serve you today?

USER: I would like to book a ticket from LGA to AUS, as there is a family function to attend at Austin? Can you help me in booking?

ASSISTANT: Sure, kindly mention your journey dates please?

USER: My trip dates are Aug 05 to Aug 07.

ASSISTANT: Please share me your budget for flight ticket.

USER: My fare is 1000.

ASSISTANT: Just hold on a moment.

USER: Sure, but my airline preference is Normal-cost.

ASSISTANT: We found a flight with normal cost of flight 1012 and cost is 100. Can I proceed with the booking?

USER: You can reserve it.

ASSISTANT: Your ticket has been confirmed with an airline UA in an economy class.

USER: Thank you.

ASSISTANT: Thank you for opting us.