You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Clark.

ASSISTANT: How can I aid you?

USER: Can you please help me to book a connecting flight from DTW to MCO?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Sure, I want to travel on Oct 18 and need to return on Oct 20.

ASSISTANT: Do you have any specifications?

USER: Yes, I want to travel in business class.

ASSISTANT: Sorry to say, there are no flights available for your desired dates.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for reaching us.