You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Robert Gonzalez.

ASSISTANT: What kind of services are you looking for?

USER:  I want to participate in the multi-car 50 mile canyon road test drive, which is going to be held at Denver, DEN.

ASSISTANT: Robert Gonzalez, can you please share your planned dates?

USER: I want to travel on Apr 27, and need to catch return flight on Apr 29.

ASSISTANT: May I know your source airport code also?

USER: I want to board from ORD.

ASSISTANT: Do you need any stopover between your journey?

USER: Yes, I need a halt.

ASSISTANT: May I know your affordable price to proceed with further booking process?

USER: Make sure to check a flight with in a price limit of 500.

ASSISTANT: Do you have any other preferences?

USER: I prefer a economy class.

ASSISTANT: Flight-1017 is available with 1 connection at the price of 100 by Southwest airlines in economy class. Can I book it for you?

USER: Proceed with the booking.

ASSISTANT: Your ticket is successfully booked.

USER: Thanks for the help.

ASSISTANT: Thank you for helping me with booking. Have a safe journey.