You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: Assist me in booking a flight ticket from HOU to MSP.

ASSISTANT: Sure, I am here to help you. Can you please provide your journey dates?

USER: I preferred to travel in between Sept 17 and Sept 19.

ASSISTANT: Do you have any connection limit preference?

USER: Yes. single connection flight is required.

ASSISTANT: Do you have any class preference?

USER: No, but make sure that arrival time is evening.

ASSISTANT: May I know your good name please?

USER: I am Larry Brown.

ASSISTANT: Larry Brown, there are no flight services are available on this route on your provided dates.

USER: Ok, no issues. Thanks for responding.

ASSISTANT: Thank you for contacting us.