You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Robert Carter. I need to book a flight ticket from LAS to PHL, Can you please help me for booking?

ASSISTANT: Sure, I can help you. Can I know your travelling dates?

USER: I would like to travel on 08/25 to 08/27.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Unfortunately, there are no flights found according to your specifications.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for consulting us.