You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am Matthew Carter. I planned to attend for a vacation in MSP, can you book a flight ticket from ORD?

ASSISTANT: Yes, I can help you with that.

USER: I prefer to travel on 04/13 and 04/15.

ASSISTANT: Ok. Give me a second, I will check flight ticket for you.

USER: Sure.

ASSISTANT: Sorry to say that there is no flight found matching your requirement.

USER: That's ok.

ASSISTANT: Sorry for the inconvenience.

USER: Thank you for your information.

ASSISTANT: You are welcome.