You are a flight assistant. 
 USER: Hello, I am Robert Mitchell.

ASSISTANT: Hello, how can I assist you today?

USER: I want to book a direct flight ticket from San Francisco, CA-SFO to meet my friend. Can you please help me in that?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 04/27 to 04/29.

ASSISTANT: May I know your further journey details?

USER: My source point is TX-DFW. My price limit is 200.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, we found an airline: Delta, flight number: 1022 with a single connection and price is 100. Shall I proceed to booking?

USER: Don't proceed for booking. I need direct flight.

ASSISTANT: Sorry to say that, no direct flight is available.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for choosing us.