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

ASSISTANT: Hello, how may I assist you for today?

USER: I want to travel from SFO to DFW to meet my cousin, Can you please book a ticket for me?

ASSISTANT: Sure, we are here to help you. May I know your journey dates?

USER: 09/24 to 09/26 with price 500.

ASSISTANT: Wait a moment.

USER: Sure.

ASSISTANT: We did not found a flight with price limit 500.

USER: Ok. Thank you.

ASSISTANT: Thank you for choosing us.