You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can you please tell me how may I assist you?

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

ASSISTANT: Yes, I can assist you to book the ticket. Could you please mention your travel dates?

USER: My travelling dates are Dec 12 and Dec 14.

ASSISTANT: Do you prefer a business class or an economy class flight?

USER: I am comfortable with any class.

ASSISTANT: Ok, which flight do your prefer either a direct flight or a connecting flight?

USER: I want single connected flight.

ASSISTANT: Ok, please mention your full name.

USER: Sure, I am Joshua Moore.

ASSISTANT: Sorry to say that, there are no flights available in this route on the dates you have given.

USER: Ok, no worries. Thank you.

ASSISTANT: Most welcome. Thank you for opting us.