You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a flight from DTW to attend family meeting. Can you book a flight to CLT?

ASSISTANT: Sure, I will help you with that. Can you please provide your preferable dates of travelling?

USER: I will fly on Jan 18 and return on Jan 20.

ASSISTANT: Do you have any connection limit?

USER: I prefer a connecting flight.

ASSISTANT: Any more specifications do you have?

USER: No.

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

USER: Emily Roberts.

ASSISTANT: Please wait a moment to check the flights.

USER: Sure.

ASSISTANT: We regret to inform you that, there are no flights available on your route with your requested dates of travelling.

USER: Ok, thank you for the information.

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