You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Joshua Allen here.

ASSISTANT: How can I assist you for the day?

USER: I want to book a flight ticket. So, can you please check for the flights from DEN - CLT?

ASSISTANT: Sure, I am here to help you with that. Can you please share your preferable travel dates?

USER: My travelling dates are 02/20 and 02/22.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I want 1 halt in between my journey.

ASSISTANT: DO you have any other specifications?

USER: Yes, my return time should be in evening only.

ASSISTANT: Sorry to inform you that, there are no flights available as per your details.

USER:  Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us, have a great day.