You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I best serve you now?

USER: I am Carolyn Hall.

ASSISTANT: Thanks for providing your name.

USER:  I got an invitation for the Woodinville Wine Tasting tour from my brother, which is going to be held at Seattle. Can you book me a ticket within the range 500?

ASSISTANT: Sure, may I know your boarding and landing airport codes?

USER: I need to leave from my nearest airport LAS to reach SEA.

ASSISTANT: Can you please let me know your journey dates?

USER: I want to travel on 11/28, and need to catch return flight on 11/30.

ASSISTANT: Do you need any lay by in between journey?

USER: Yes, I need a lay by.

ASSISTANT: There is a flight found with Southwest airline of flight number 1003 and fare is 100. Shall I proceed for booking?

USER: Proceed with the booking.

ASSISTANT: Your ticket has been reserved.

USER: Thanks for your service.

ASSISTANT: Thanks for contacting us, have a great journey.