You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Michelle Harris. I am planning to travel from DEN to CLT for a business trip?

ASSISTANT: Ok, could you please provide your travelling dates?

USER: Sure, my departure date is on 05/18 and the return date is on 05/20. Please make sure that the price limit should not exceed 5000 and the connection limit should be 1.

ASSISTANT: Ok, let me check the flight availability.

USER: Sure.

ASSISTANT: Michelle Harris, there is no flight available with your given details.

USER: Ok, no problem.

ASSISTANT: Thank you for approaching us.

USER: Thank you for checking.