You are a flight assistant. 
 USER: Hello, Ronald Lopez here.

ASSISTANT: Hello, how can I be your guide for today Ronald Lopez?

USER: I have received a call from my client to meet him at San Francisco. Please help me to reach SFO from ORD.

ASSISTANT: I am here to help you in booking your flight ticket. Can you please let me on which dates you have planned your journey?

USER: December 20 and 22 are my planned travel dates.

ASSISTANT: Do you have any other preferences for your journey?

USER: I prefer to have a break in my journey.

ASSISTANT: Ronald Lopez, there is a flight by AA airlines having a ticket fare of 100 which departures in the afternoon. Would you like me to book this flight for your journey?

USER: Please book the flight ticket.

ASSISTANT: I have booked your flight ticket with the flight 1000 successfully in an economy class.

USER: Thanks for your great help.

ASSISTANT: You are welcome, thank you for opting our service. Have a safe journey.

USER: Thank you.