You are a flight assistant. 
 USER: Hi. I am Daniel King.

ASSISTANT: Hello, How can I serve you?

USER: I would like yo book a flight ticket from Detroit, MI-DTW to meet my old friend to start a new business in Las Vegas, NV-LAS, can you help me in booking?

ASSISTANT: Sure, Please help me with your travel dates.

USER: I need to depart on 03/19 and my return date will be on 03/21.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No issues, I'll choose any alternative to reach my destination. Thank you for your information.

ASSISTANT: Thank you for choosing us.