You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I help you?

USER: Can you please reserve me a flight ticket from PHL to ORD?

ASSISTANT: Do you want to fly with economy class or business class?

USER: I need a business class.

ASSISTANT: May I know your connection limit?

USER: I need a single connection.

ASSISTANT: When you are planning to travel?

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

ASSISTANT: Please provide your name.

USER: I am Carol Williams.

ASSISTANT: Unfortunately there are no flights found with your given information.

USER: No problem, thank you.

ASSISTANT: Thank you for availing us.