You are a flight assistant. 
 USER: Hello, I am Jack Rodriguez.

ASSISTANT: Hello, how may I assist you?

USER: Can you render me in booking a ticket from SFO to PHL?

ASSISTANT: Sure, I am happy to help you. May I know your travel dates please?

USER: I am planning to start on 02/20 and return back on 02/22.

ASSISTANT: Ok, hold on for a moment. Let me check the best flight for you.

USER: Make sure that ticket's price is within 200.

ASSISTANT: Sorry Jack, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.

USER: Welcome.