You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to visit San Francisco, CA - SFO as a round trip, can you be my helping hand for booking a ticket.

ASSISTANT: Sure, I will help you, could you please help me with you travelling details?

USER: My travelling dates are 08/14 and 08/16, with the price of 1000.

ASSISTANT: Ok, please wait for while. I will check and revert you about flight.

USER: OK.

ASSISTANT: We are gleeful to say, there is direct flight of UA airline with 200 charge, flight number as 1011.

USER: Ok, you can confirm the booking.

ASSISTANT: Ok, your booking is done.

USER: Thanks for your service.

ASSISTANT: Thanks for availing us. May I know your name ?

USER: David Rodriguez.

ASSISTANT: Thank you David Rodriguez, have a great day.

USER: Thank you.