You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you for the day?

USER: I would like to visit 16th Street mall at Denver with my colleagues. Can you help me out with book a ticket with a direct flight?

ASSISTANT: Sure, may I know the dates you have scheduled to travel?

USER: My travelling dates are from 07/24 to 07/26.

ASSISTANT: Can you please provide your journey points?

USER: My journey start from Chicago,ORD to Denver, CO-DEN.

ASSISTANT: Do you have a restriction for price in booking a flight ticket?

USER: Make sure that price limit should be 1000.

ASSISTANT: Ok, let me check the details of flight and revert you in a moment.

USER: Ok.

ASSISTANT: Unfortunately, we do not have a direct flight on your preferred dates.

USER: Ok, Not an issue.

ASSISTANT: May I know your name please?

USER: My name is Robert Robinson.

ASSISTANT: Ok.

USER: Thank you.

ASSISTANT: Thank you for contacting us, have a blissful day.