You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in booking my flight ticket from LGA to LAS?

ASSISTANT: Sure, I am glad to help you. Can you please share your travel dates?

USER: My trip dates will be Mar 13th to Mar 15th.

ASSISTANT: May I know your name?

USER: I am Paul Martin.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any preferences?

USER: No.

ASSISTANT: Sorry, there are no flights found on your travel dates.

USER: Its ok, thank you.

ASSISTANT: Thank you for choosing us.