You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Karen White here. I want to book a flight ticket from ATL to JFK. Can you help me in that?

ASSISTANT: Sure, may I know your travel dates?

USER: My trip dates are Oct 31 to Nov 2.

ASSISTANT: Do you have any connection limit?

USER: I need a direct flight.

ASSISTANT: May I know your airline preference?

USER: No.

ASSISTANT: Which class do you prefer to travel?

USER: I am okay with any class.

ASSISTANT: Do you have any specific departure and arrival time?

USER: My depart time should be in the evening.

ASSISTANT: Ok, please be on hold.

USER: Sure.

ASSISTANT: Sorry, there are no flights in this route as per your travelling details.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.