You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please book a ticket from Seattle, SEA to San Francisco, SFO to attend Innovation festival.

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My scheduled dates are Jan 21 and Jan 23.

ASSISTANT: Ok, do you have any specifications?

USER: My return time is afternoon.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Ok.

ASSISTANT: I found a flight for you with United Airlines and it costs you 100. Shall I proceed?

USER: Ok, please proceed.

ASSISTANT: May I know on whose name you would like to book this ticket?

USER: I am Raymond Moore.

ASSISTANT: Your ticket has been booked with 1016 flight number.

USER: Ok, Thank you.

ASSISTANT: Welcome, thank you for choosing us. Have a safe flight.