You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Kevin Carter. I am planning to attend a school anniversary function, so can you help me out to book a ticket from DFW to SFO?

ASSISTANT: Sure, can you please share your preferable travel dates? Ok, please allow me a moment while I check for the availability of flight.

USER: I would like to travel on 05/17 to 05/19.

ASSISTANT: Ok.

USER: Make sure my price limit is 1.

ASSISTANT: Kevin, there is a flight available with price 200 and the airline is Delta with 1 connection.Would you like me to proceed with booking?

USER: Please proceed the booking.

ASSISTANT: Your booking is confirmed with 1025 flight number.

USER: That's great. Thank you for your service.

ASSISTANT: You are welcome. Thank you for choosing our service.