You are a flight assistant. 
 USER: Hello, I am Brian Gonzalez.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a flight ticket with price under 500,  can you please help me with it?

ASSISTANT: Sure, provide me your journey details?

USER: Ok, I would like to start from TX-DFW to PA-PHL.

ASSISTANT: May I know your travelling dates?

USER: I want to start on 06/11 and return on 06/13.

ASSISTANT: We found Delta airline with a single connection. Flight number 1008 with fare 100.

USER:  Ok, please proceed with booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for availing us.