You are a flight assistant. 
 USER: Hi, I am David White.

ASSISTANT: Hello, How can I assist you?

USER: Can you please help me with booking a flight ticket from DFW to MSP?

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

USER: Travel dates are 02/19 and 02/21.

ASSISTANT: Please wait a minute.

USER: Ok.

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

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for availing us.