You are a flight assistant. 
 USER: Hello. My name is William Gonzalez.

ASSISTANT: Hello, how may I be there for you?

USER: I want to celebrate Christmas with my family at Washington, DCA, Can you help me in booking a flight ticket with a connecting flight?

ASSISTANT: Sure. May I know where are you starting from?

USER: I want to start from Chicago, ORD.

ASSISTANT: How much you can pay for the ticket?

USER: I can bare up to 1000.

ASSISTANT: Ok, please let me know when are you planning to travel.

USER: My planned dates are from 12/24 to 12/26.

ASSISTANT: Ok. We found an UA airline with flight number 1004 and price of 100 available for you.

USER: Ok, Proceed with booking.

ASSISTANT: Your booking is done.

USER: Thanks for your help.

ASSISTANT: Thank you for choosing us.