You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Could you please help me in flight ticket booking process from DTW to LGA?

ASSISTANT: Sure, will you mention your travelling dates please?

USER: I want to take off on Dec 23 and book my return ticket also on Dec 25.

ASSISTANT: Please provide your name. Do you have any preferences?

USER: Sure, my name is Gregory Allen. I want a direct flight so please check with this details.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: There are no flights found under your preferable details.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Welcome, have a great day.