You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket from LGA to LAS, can you help me?

ASSISTANT: May I know your trip dates?

USER: My trip dates are from Oct 4 and Oct 6.

ASSISTANT: May I know your name please?

USER: Myself Scott Carter.

ASSISTANT: Do you have any connection limit preferences?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any other concern?

USER: I prefer economy class for my journey, and ensure my depart time should be morning.

ASSISTANT: Sorry, no flights found as per your preferences.

USER: That's fine, not an issue. Anyway thank you for checking.

ASSISTANT: Thank you.