You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book the flight ticket from DFW to SFO. Can you find a flight ticket for me?

ASSISTANT: Please provide your journey dates?

USER: Ok, my planned trip dates are on Apr 26 and return on Apr 28.

ASSISTANT: Is there any preference?

USER: I need a single connecting flight.

ASSISTANT: May I know your name?

USER: Ok, I am Shirley Nelson.

ASSISTANT: Found flight with American airlines for price 100 having flight number 1000. Shall I book a ticket?

USER: Please proceed with the ticket booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for your help.

ASSISTANT: Thank you.