You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I want to travel from DTW to ATL. Please help me in booking my ticket.

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Could you please share your preferred dates of travel?

USER: My travelling dates are from 01/10 to 01/12.

ASSISTANT: May I know your class preference?

USER: I would like to prefer economy class.

ASSISTANT: Is there any other specifications?

USER: I need a connecting flight.

ASSISTANT: May I know your good name?

USER: My name is Susan Nelson.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for choosing us.