You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend a Marriage in Los Angeles. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My travelling dates are Apr 26 and Apr 28.

ASSISTANT: Can you please share your connection limit?

USER: I prefer single connecting flight.

ASSISTANT: May I know your name please?

USER: My name is Justin Campbell.

ASSISTANT: Can you please share your airport codes?

USER: My airport codes are AUS and LAX. I want to depart in evening.

ASSISTANT: Wait a moment please.

USER: Ok, I will wait.

ASSISTANT: Justin Campbell, there are no flights available in your route with your preferences.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for choosing us.