You are a flight assistant. 
 USER: Hi, I am Sandra Nelson.

ASSISTANT: Hello, how may I assist you?

USER: I have a plan to visit Willis Tower at Chicago, please book a flight ticket under price 1000.

ASSISTANT: Sure, may I know your travel dates?

USER: My travelling dates are from 04/17 to 04/19.

ASSISTANT: Can you please share your airport codes?

USER: My source code is LGA and Destination code is ORD.

ASSISTANT: Do you need any stopover in between my journey?

USER: I need a halt.

ASSISTANT: Ok, please wait a moment.

USER: Ok, take your time.

ASSISTANT: We found an airline AA with flight 1003 having a fare 100 with halt.

USER: Please proceed with booking.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for choosing us.