You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide assistance to you?

USER: I am Debra Campbell want to meet my grand parents who are living in Los Angeles, can you book a ticket on dates 12/11 and 12/13? Yes, I need a flight with price under 500.

ASSISTANT: Sure, please mention your airport codes?

USER: Ok, I would like to travel from IAD to LAS.

ASSISTANT: WE found a flight with your requirement, price is 100 with single connection limit.

USER: Ok, proceed with my booking.

ASSISTANT: Your booking is confirmed. Thanks for reaching us.

USER: Thank you.