You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Eric Collins. I need a direct flight, Could you please help me with booking a flight ticket?

ASSISTANT: Is there any class preference?

USER: I need a  business class.

ASSISTANT: May I know your airport codes please?

USER: Sure, my airport codes are BOS and IAD.

ASSISTANT: Can you please share on what dates you have planned to travel?

USER: Sure, my travelling dates are Mar 14 and Mar 16.

ASSISTANT: Please provide your specifications.

USER: I would like to depart in the afternoon.

ASSISTANT: We are sorry to inform you that there is no flights found with your given dates.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for approaching us.