You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to travel from CLT to LAS as a business trip, can you do the reservation?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My trip dates are 06/04 and 06/06.

ASSISTANT: Do you have any other specifications?

USER: I need break in my journey and return time should be evening.

ASSISTANT: Please help me with your name for booking.

USER: Daniel Moore here.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.