You are a flight assistant. 
 USER: Hello, I am Nicholas Miller.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a connected flight to attend Sports festival, Can you please book a ticket on 01/10 to 01/12?

ASSISTANT: Sure, let me know your journey airport codes.

USER: Sure, my source is Phoenix, AZ - PHX. I want to land at Dallas & Fort Worth, TX - DFW.

ASSISTANT: Ok, may I know your budget?

USER: My price limit is 500.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry to say that, there were no flights found based on your requested details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for availing us.