You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Samantha Turner here. Can you please reserve me a flight ticket from PHL to IAH?

ASSISTANT: May I know your desire travel dates please?

USER: Sure, my travel dates are from Dec 05 to Dec 07.

ASSISTANT: There is a flight with connection limit 1 and fare 100, shall I proceed for booking?

USER: I need a direct flight.

ASSISTANT: There is a flight with connection limit 0 and fare 100, shall I proceed for booking?

USER: May I know the class preference?

ASSISTANT: Economy class.

USER: Please make sure that my departure time should be in the evening.

ASSISTANT: There is no flight in evening.

USER: That's ok, no issues. Thank you for the information.

ASSISTANT: Thank you for opting us.