You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I need to travel LAS and CLT, can you please help me? My travelling dates are Dec,05 and Dec,07.

ASSISTANT: Sure, I am here to help you , can you share me your trip dates? Do you have any class preference?

USER: No, I need single connection flight.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT: May I know your name please.

USER: Myself Donal Miller.

ASSISTANT: Sorry, no flights are found on your trip dates. Thank you for reaching us.