You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, can you share your trip dates?

USER: My planned dates are on Dec 4th to 6th.

ASSISTANT: Do you have any preferences?

USER: I would like to return in afternoon time.

ASSISTANT: May I know your name?

USER: Sure, my name is Michelle Martinez.

ASSISTANT: There is a connecting flight with number 1025 in airline Frontier, the fare is 100 in economy class. Can I book it?

USER: Ok, please proceed.

ASSISTANT: Your ticket is reserved.

USER: Thank you.

ASSISTANT: Thank you for opting us.