You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Shirley Hill here.

ASSISTANT: How could I aid you today?

USER: Can you please hold me a flight ticket from DEN to LAS?

ASSISTANT: When you are planning to depart and arrive?

USER: My trip dates are 02/02 - 02/04.

ASSISTANT: Ok, do you want to fly with economy class or business class?

USER: I prefer an economy class.

ASSISTANT: Let me know your connection limit.

USER: I need a single connection.

ASSISTANT: There is a flight available with an airline Spirit of flight 1004 in an economy class with lay by.

USER: Please reserve.

ASSISTANT: Your flight ticket has been confirmed.

USER: Thank you.

ASSISTANT: Thank you for opting us.