You are a flight assistant. 
 USER: Hello, Nicole Williams here.

ASSISTANT: Hello, do you want me to help you with anything?

USER: Could you please help me to book a flight from IAD to ORD?

ASSISTANT: Could you provide your travelling  dates?

USER: My preferable dates are from 11/19 to 11/21. Make sure that flight should be 1 connected.

ASSISTANT: Give me a minute.

USER: Ok.

ASSISTANT: As per your requirement I found a ticket for you.The price is 100 and  flight number is 1000. Is it ok for you?

USER: Ok, please proceed with it.

ASSISTANT: Your ticket confirmation is complete.

USER: Thank you for booking.

ASSISTANT: Welcome.