You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me in booking my flight ticket from LAX to CLT?

ASSISTANT: Sure, I will help you. When would you like to plan your journey?

USER: My travelling dates are Dec 19 and Dec 21.

ASSISTANT: Can I have your name please?

USER: Myself Laura Miller.

ASSISTANT: Do you need any break in between your journey?

USER: I need single connection flight.

ASSISTANT: May I know your class preference?

USER: I need business class ticket.

ASSISTANT: Do you have any other specifications?

USER: I need my depart ticket at evening time.

ASSISTANT: Please hold on a moment.

USER: Ok, sure.

ASSISTANT: Laura Miller, no flights has been found on your specifications.

USER: Ok, thanks for your information.

ASSISTANT: Thank you for choosing us.