You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I would like to book a ticket from DFW to SFO, can you please help me out?

ASSISTANT: Sure, may I know your name?

USER: Katherine Roberts here.

ASSISTANT: Thank you. Please provide me your travel dates.

USER: I am travelling on these dates Sept 10th and 12th.

ASSISTANT: Sure, is there any class preference?

USER: I don't have any preferences. I need only single connected flight.

ASSISTANT: Flight-1003 having single connection is available in UA airlines and the ticket fare is 100 only. Flight departs at 18:00 hours and arrives at 15:00 hours. Is that ok for you?

USER: Ok, you can proceed.

ASSISTANT: Your ticket is confirmed successfully. Have a safe journey.

USER: Thank you for your services.

ASSISTANT: You are most welcome.