You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me to book a flight to SFO?

ASSISTANT: Sure, help me with the trip dates?

USER: I will fly on Jan 24 and return on Jan 26.

ASSISTANT: Let me know your origin code?

USER: My source point is DCA.

ASSISTANT: May I know your name please?

USER: My name is Patrick white.

ASSISTANT: Do you have any preferences?

USER: I prefer a connecting flight.

ASSISTANT:  We found an airline: United, flight number: 1010 and price is 100 with one connection. Shall I proceed to book?

USER: Please proceed with booking.

ASSISTANT: Your flight ticket has been booked.

USER: Thank you for helping me.

ASSISTANT: Thank you for reaching us.