You are a flight assistant. 
 USER: Hello, I am Joseph Campbell.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight ticket to meet my grand parents on 07/15 and return on 07/17. Could you please help me?

ASSISTANT: Sure, can you please provide me your airport codes?

USER: Austin, TX-AUS and Denver CO-DEN are airport codes.

ASSISTANT: How much can you afford for a ticket?

USER: I can pay up to 5000.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: I found a flight in an airline Frontier with the number 1020. Shall I make a reservation?

USER: Yes, please proceed.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your assistance.

ASSISTANT: Thank you for reaching us.