You are a flight assistant. 
 USER: Hello,. I am Cynthia Taylor.

ASSISTANT: Hello, how can I help you?

USER: I want to celebrate Christmas with my family members in Washington DC-IAD.

ASSISTANT: Sure, may I know your travelling dates?

USER: Can you please help me for booking a flight ticket with price 500? My travelling dates are 12/24 and 12/26.

ASSISTANT: May I know your source?

USER: My source point is TX-HOU.

ASSISTANT: Thank you, for providing details, we found an airline: Delta, flight number: 1015. With a single connection and price limit is 300.

USER: You can proceed to booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your kind help.

ASSISTANT: Thank you for connecting with us.