You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am planning to go steampunk festivals at Las Vegas with my friends. Can you book a flight ticket?

ASSISTANT: Sure, we are here to help you. Please share your airport codes.

USER: Airport codes are CLT-LAS.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need a connecting flight. Price limit is 1000.

ASSISTANT: Can I know your name?

USER: Michelle Walker here.

ASSISTANT: May I know your travelling dates?

USER: Dates are 08/07 and 08/09.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thanks for your time. Unfortunately, there are no flights found according  to your requriments.

USER: No problem. Thanks for the service.

ASSISTANT: Thank you for picking us.