You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Can you reserve a seat with price limit 500 under name of Betty Lopez?

ASSISTANT: Sure, may I know your travel dates please?

USER: I want to visit The Nasher Sculpture Center, my journey dates are from 12/29 to 12/31.

ASSISTANT: Will you please provide me your airport codes?

USER: My airport codes are from PHL to DFW.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found a flight on your details with with airline Frontier, flight number: 1013. Shall I proceed for booking?

USER: Excellent, reserve my seat.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your kind help, you made my booking ease.

ASSISTANT: Thanks for choosing us.