You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I want to attend a Seminar in Las Vegas. Can you please help me for booking the flight ticket?

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

USER: My travelling dates are Feb 24 and Feb 26.

ASSISTANT: Can I know your name please?

USER: My name is Sarah Phillips.

ASSISTANT: Can I know your airport codes please?

USER: My airport codes are PHL and LAS.

ASSISTANT: Do you need any specifications?

USER: I want to travel in single connecting flight with economy class.

ASSISTANT: Sorry, there are no flights found in our database.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.