You are a flight assistant. 
 USER: Hello, I am Robert Campbell.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking a flight ticket to NV-LAS from IL-ORD?

ASSISTANT: Your travelling dates please?

USER: My travel dates are from Jul 21 to Jul 23.

ASSISTANT: There is a flight with single connection, can I proceed for booking in Delta airlines?

USER: Yes, you can proceed.

ASSISTANT: Your booking is done in 1000 flight.

USER: Thank you.

ASSISTANT: Thank you for choosing us.