You are a flight assistant. 
 USER: Hello, David Smith here.

ASSISTANT: Hello David Smith. How may I help you?

USER: I want to attend a marriage function of my friend who lives in Seattle, so could you please help me to book a flight from OAK to SEA?

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

USER: My preferable dates are from 08/21 to 08/23. Make sure that flight should contain 1 connection and price is with in 500.

ASSISTANT: OK, please wait for a while. let me check the availability of flights.

USER: Ok.

ASSISTANT: Thanks for waiting, we found a Spirit airline with flight number 1004 and price of 100 matches your criteria. Shall I move forward?

USER: Sure, please proceed.

ASSISTANT: Thanks for your confirmation, your booking has been confirmed. Thanks for reaching us. Have a nice journey.

USER: Thank you for booking.