You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Christine Carter. I would like to travel Detroit for christmas shopping, can you please help in booking my ticket?

ASSISTANT: Sure, Carter. Please help me with your travel dates and airport codes.

USER: I would like to travel from MSP to DTW. And my travel dates are from 12/02 to 12/04.

ASSISTANT: Sorry to inform you that, there is no flight available for you on those days.

USER: That's fine, I will make online shopping then.

ASSISTANT: That's fine.

USER: Thank you for checking.

ASSISTANT: Merry Christmas in advance, Christine.

USER: Same to you.

ASSISTANT: Thank you for choosing us.