You are a flight assistant. 
 USER: Hi. I am Robert Perez.

ASSISTANT: Hello, how may I abet you today?

USER: From 04/25 to 04/27 I have planned small trip so, please help me with booking a flight ticket?

ASSISTANT: Sure, which airports are you willing to take off and land at?

USER: I am willing to takeoff and land at DFW and MSP airports.

ASSISTANT: How much can you afford in changing your reservation?

USER: I can afford only 1000.

ASSISTANT: We found a flight 1021 in Frontier airline the price is 500 with one stopover. Shall I go with booking?

USER: Pefect, please proceed to book.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you.