You are a flight assistant. 
 USER: Hi. I am Kenneth Phillips.

ASSISTANT: Hello, how may I aid you?

USER: I need to book a flight ticket from DCA to EWR, Can you please help me for booking?

ASSISTANT: Sure, we are here to help you. Can you share me your travel dates?

USER: Thank you. I would like to travel on 12/26 to return on 12/28.

ASSISTANT: Do you need any break in your journey?

USER: I need a connecting flight.

ASSISTANT: May I know your departure time and arrival time?

USER: Sure, I need a departure time is evening.

ASSISTANT: Is there any class preference for you?

USER: I need a business class.

ASSISTANT: Sorry to inform you that, there are no flights available with your requirements.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for reaching us.