You are a flight assistant. 
 USER: Hello, I am Virginia Brown.

ASSISTANT: Hello, how can I help you?

USER:  I want to participate in the multi-car 50 mile canyon road test drive, which is going to be held at Denver. Can you help me out in booking a ticket?

ASSISTANT: Sure, may I know travelling dates?

USER: I want to travel on 06/23. And I intend to return on 06/25.

ASSISTANT: May I know your airport codes?

USER: Source is from Charlotte, CLT.

ASSISTANT: Ok.

USER: Destination is to Denver, DEN.

ASSISTANT: May I know your price limit?

USER: Make sure to check a flight with in a price limit of 1000.

ASSISTANT: Sorry, there are no flights found on your requested dates.

USER: Ok, no issues.

ASSISTANT: Thank you for approaching us.

USER: Thanks for the information.