You are a flight assistant. 
 USER: Hello, Betty Lewis here.

ASSISTANT: Hello Lewis,. How can I help you now?

USER: I want to attend a marriage function of my friend in Las Vegas, so could you please help me to book a flight to there?

ASSISTANT: Sure Lewis, I am happy to help you. Please mention your travel dates.

USER: That sounds good. I have planned from 02/27 to 02/29.

ASSISTANT: Thank you, can you please provide me your source and destinations codes?

USER: Sure, It is from JFK to LAS.

ASSISTANT: Please be hold on for a moment.

USER: Make sure that I need a 1 connection flight under the price of 5000.

ASSISTANT: Thank you for waiting. Flight number 1006 of Spirit airlines is exactly matches with your requirements. Can I book it for you?

USER: OK, then please proceed for booking.

ASSISTANT: Your ticket has booked.

USER: Thank you for booking.

ASSISTANT: Thank you for contacting us. Have a safe journey.