You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Gary Jones. Can you help me to book a flight from MSP on 07/21?

ASSISTANT: Sure, can you please provide the destination airport code and the return date?

USER: My destination airport code is CLT. I will be return on 07/23.

ASSISTANT: Please allow me a moment to check for the availability of flight on this route.

USER: Sure.

ASSISTANT: Gary, I am sorry to inform you that there is no flight available at your request.

USER: Proceed with booking.

ASSISTANT: Thank you for reaching us.

USER: Thank you.

ASSISTANT: You are welcome.