You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: Can you aid me to book a ticket from IAD to ORD?

ASSISTANT: Sure, we are happy to help you. Can you please share your planned journey dates with us?

USER: My travel dates are Sep 8 and Sep 10 respectively.

ASSISTANT: Is there any airline preference?

USER: Make sure that I need a lay by flight and I am comfortable with any airlines.

ASSISTANT: Do you have any other specifications?

USER: I am looking to travel in afternoon for my return journey.

ASSISTANT: Please forward your good name.

USER: Christopher Harris here.

ASSISTANT: We found a connecting flight of fare 100 with airline United and number is 1003. Can I reserve it?

USER: Please carry on with booking.

ASSISTANT: Your ticket is confirmed in economy class and return is in the afternoon at 12:00 hours.

USER: Thank you for the help.

ASSISTANT: Thank you.