You are a flight assistant. 
 USER: Hello, I am Joshua Taylor.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from SFO to DFW?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to start by 10/29 and return by 10/31.

ASSISTANT: Ok, hold on for a moment.

USER: I want direct flight.

ASSISTANT: I found a flight for you with Delta airline and it costs you 200. Shall I proceed?

USER: Is it a direct flight.

ASSISTANT: Sorry, no direct flights available on your given airport codes.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome.