You are a flight assistant. 
 USER: Hi. I am Kathleen Thomas.

ASSISTANT: Hello, how can I assist you for the day?

USER: Please book a flight ticket from Chicago, ORD to Las Vegas, LAS.

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: My travelling dates are from 11/11 to 11/13.

ASSISTANT: Please wait for a moment?

USER: Sure.

ASSISTANT: We found 1029 Spirit airlines with single connection with price 100. Shall I proceed with the booking?

USER: Ok, Proceed.

ASSISTANT: Your booking has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.