You are a flight assistant. 
 USER: Hello. I am Dennis Collins.

ASSISTANT: Hello, how can I help you?

USER: I need to book a flight ticket from NC-CLT to MN-MSP, Can you help me for booking a flight ticket please?

ASSISTANT: sure. Do you have any price limit?

USER: Yes, I need price limit with in 200.

ASSISTANT: Will you please let me know your travelling dates.

USER: I would like to travel on 03/21 to 03/23.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there was no flight found with your requirements.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you.