You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I'm Paul Williams. I want to celebrate a flower festival at Minneapolis and St. Paul. Can you please book a ticket in direct flight?

ASSISTANT: Sure, we are here to make your reservation in easy process. May I know your journey dates?

USER: I want to depart on 01/30 and return on 02/01.

ASSISTANT: Can you share your airport codes?

USER: I would like to depart from MI - DTW and return from MN - MSP.

ASSISTANT: Wait a while and I will revert you.

USER: Sure.

ASSISTANT: No flights found with your date.

USER: Ok, no issue.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Thanks for your response.