You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is John Jones.I want to travel from MN-MSP to TX-HOU.

ASSISTANT: Can I know your preferable dates?

USER: My departure date is 12/21 and return date is 12/23.

ASSISTANT: Give me a minute, let me check the details.

USER: Make sure my price limit is 1000 and connections limit is 1.

ASSISTANT: Sorry Jones, there are no flights available on your requested dates.

USER: OK, thanks for your help.

ASSISTANT: Welcome. Have a nice day.