You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I am Robert Taylor. I want to book a flight ticket to celebrate the food festival in Detroit.

ASSISTANT: Sure, kindly mention your travel dates.?

USER: I would like to fly on 04/16 and return on 04/18.

ASSISTANT: Can you please provide me your airport codes?

USER: My source is Houston, TX - IAH and destination code is MI - DTW.

ASSISTANT: There is a flight with your requirement, airline is Delta with direct flight. Shall I proceed with booking?

USER: Don't proceed to booking. I need a halt.

ASSISTANT: Ok. Thanks for reaching us, have a good day.

USER: Thank you.