You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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

ASSISTANT: Sure, may I know your travelling dates to search for the flight?

USER: My travelling dates will be on Jan 12 to Jan 14.

ASSISTANT: Do you have any connection preferences?

USER: I would like to travel in a connecting flight.

ASSISTANT: May I know your requirements?

USER: I would prefer a economy class. I would prefer a well known airlines.

ASSISTANT: May I know your name?

USER: Anna Scott here.

ASSISTANT: Sorry to say, no flight is available for you as per your requests.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for reaching us.