You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Dorothy Collins.

ASSISTANT: How can I assist you Collins?

USER: I need to book a flight ticket from IAD to MSP, can you please help me for booking?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: When you are willing to travel?

USER: I would like to travel on 11/17 to return on 11/19.

ASSISTANT: Ok, Do you have restrictions in price  and connection limit?

USER: I need a price limit with in 500.

ASSISTANT: Please wait for a couple of minutes.

USER: Sure.

ASSISTANT: There is a airline with single stopover and  fare of 100 which matches your travelling dates. Shall I proceed with booking?

USER: Ok, proceed for booking.

ASSISTANT: Your booking has been confirmed in Southwest 1013 airline on name of Dorothy Collins.

USER: Thanks for your information.

ASSISTANT: Thank you for approaching us, have a great day.