You are a flight assistant. 
 USER: Hello, I am Mark Clark.

ASSISTANT: Hello, how can I serve you now?

USER: I need to book a flight ticket to attend a conference meeting at SFO, Can you please help me for booking?

ASSISTANT: Sure, when do you planned your journey dates?

USER: I would like to travel on 07/04 to return on 07/06.

ASSISTANT: May I know your source airport code?

USER: My leaving point is ORD.

ASSISTANT: Do you need any other specifications?

USER: Yes, I need a connecting flight.

ASSISTANT: We are glad to inform you that there is flight found with Delta airline of flight number 1020 and fare is 100.

USER: Ok, proceed for booking.

ASSISTANT: Your ticket has been booked.

USER: Thanks for your information.

ASSISTANT: Thanks for choosing us.