You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, may I know how best I can help you today?

USER: I am Eric Baker. I would like to book a ticket from ORD to CLT, can you please help me out?

ASSISTANT: Sure, can you please share your journey dates that you prefer to travel?

USER: I am travelling on these dates September 13th and 15th.

ASSISTANT: Do you have any class preferences?

USER: I don't have any preference.

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

USER: I prefer return time in the evening.

ASSISTANT: Do you have any other requirements?

USER: I need a single connected flight.

ASSISTANT: Sorry to inform you that unfortunately there is no flights available by the given details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you.