You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you?

USER: Betty Brown here. Can you please help me in booking a flight ticket from PHL to IAD?

ASSISTANT: Sure, please share your planned travel dates.

USER: Sure, my travel dates are from Dec 27 to Dec 29.

ASSISTANT: Is there any class preference do you have?

USER: Yes, my class preference is business.

ASSISTANT: May I know your depart and return time?

USER: I would like to depart in the evening.

ASSISTANT: Do you have any other preference?

USER: I need a connecting flight.

ASSISTANT: Sorry, we didn't find any flight which departs in the evening from PHL.

USER: Ok, no issues. Thank you for the information.

ASSISTANT: Thank you for checking it with us.