You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Carol Evans. I would like to enjoy my weekend trip with my friends. Can you please book a ticket within the price of 200?

ASSISTANT: Sure, can you please share your travel dates?

USER: I would like to start my journey on 07/27 and my return will be on 07/29.

ASSISTANT: Could you please help me with the airport codes?

USER: Sure, I want to fly from MSP to ATL.

ASSISTANT: Let me check for the availability of flight.

USER: Ok, take your time.

ASSISTANT: Carol, I am sorry to inform you that there is no flight available at your requested dates.

USER: That's ok, anyway thank you for your information.

ASSISTANT: Thank you for contacting us, have a great day.