You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How may I help you?

USER: I'm Frank Allen. As it's business trip, please book a ticket from Detroit, MI-DTW to Orlando, FL-MCO.

ASSISTANT: Sure, May I know the travel dates?

USER: My travelling dates are from 02/21 to 02/23.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Thanks for the help.

ASSISTANT: Thank you for availing us.