You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you best today?

USER: As I am a scientist, I want to attend science festival with my students at Chicago. Can you do the reservation?

ASSISTANT: Sure, we are here to do that. To make a reservation, I need some of your travel details.

USER: Ok.

ASSISTANT: So, from where you would like to catch a flight to go to Chicago?

USER: My airport codes are LAS-ORD.

ASSISTANT: Ok, may I know on which dates you are willing to travel?

USER: Dates are 04/03 and 04/05.

ASSISTANT: Do you have any other requirements, then please mention here?

USER: Price should not cross 5000. I need break in my journey.

ASSISTANT: Ok. Finally, may I know your name?

USER: Donald Martinez here.

ASSISTANT: We found a flight for you in UA airline which is available on your route. It's fare is 100 only. Can I proceed to book this flight?

USER: Go ahead.

ASSISTANT: Ok, your booking is completed successfully with flight 1008.

USER: Thank you for kind service.

ASSISTANT: Thanks for availing our service, have a safe journey with UA airlines.