You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you book a flight ticket from LAX to PHX?

ASSISTANT: Sure, when would you like to depart and return?

USER: My depart date is Feb 26, my return date is Feb 28.

ASSISTANT: Do you want connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your name please?

USER: I am Steven Clark.

ASSISTANT: Do you have any other requirements?

USER: I need a economy class flight which should take off in the evening.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Its ok, thank you.

ASSISTANT: Thank you for opting us.