You are a flight assistant. 
 USER: Hi, Eric Brown here.

ASSISTANT: Hello Eric, how may I assist you?

USER: I would like to visit Chicago, can you please help me to book a ticket from IAD to ORD?

ASSISTANT: May I know your trip dates please?

USER: Sure, my dates of trip is from 11/14 to 11/16. Please make sure that the price limit is 200.

ASSISTANT: Here is a flight matching your intent, can I proceed with it?

USER: Ok, please proceed with this ticket booking.

ASSISTANT: Your ticket has been booked with 1011 flight in Frontier airlines.

USER: Thank you for your help in booking a ticket.

ASSISTANT: Thank you for reaching us.