You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Catherine Parker here.

ASSISTANT: How can I aid you today?

USER: I want to fly from DTW to BOS. Can you check the flight availability?

ASSISTANT: Sure, I am here to help you. May I know your travel dates please?

USER: My planned travelling dates are 12/15 and 12/17.

ASSISTANT: Ok, do you have any specifications?

USER: I want a flight with maximum connection of 1.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Make sure that, my return time should be in afternoon only.

ASSISTANT: Sorry Catherine Parker, there are no flights available on your requested dates.

USER: Sad to hear that one, anyway thank you for the immediate response and providing the information.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.