You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I help you?

USER: My name is Richard Clark. I just want to book my flight ticket?

ASSISTANT: OK, Can you share your journey details?

USER: My origin airport from Chicago, IL - ORD and my destination Houseton, TX -IAH. My travelling dates from Oct/9 to Oct/11.

ASSISTANT: OK, Do you have any other specifications?

USER: My price limit is 5000 and my connection limit is 1.

ASSISTANT: Please wait for a moment.

USER: OK.

ASSISTANT: Thanks for waiting,sorry to inform you that no flight found with your requirement.

USER: OK, thank you for providing information.

ASSISTANT: Thanks for reaching us, have a good day.