You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Emma Martin here.

ASSISTANT: How can I help you for the day?

USER: Do you have any flight from CLT to LAS?

ASSISTANT: Sure, we are here to help you with this. May I know your journey dates, please?

USER: My travelling dates are 05/06 and 05/08.

ASSISTANT: Do you have any other specifications?

USER: Yes, I am looking for business class.

ASSISTANT: Sorry, there are no flights available in this route as per your travel dates.

USER: That's fine, thanks for your help and information.

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