You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you today?

USER: Can you please book a flight ticket from ORD to CLT?

ASSISTANT: Sure, will you please provide your preferable dates of travelling?

USER: My travelling dates are from June 15 to June 17.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Any connection limit do you have?

USER: I need a direct flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name to book the flight ticket?

USER: My name is Brenda Hill.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights moving towards your region with your requested dates of travelling.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for opting us, have a great day.