You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: My name is Frank Williams. I want to travel from Chicago to Houston for attending my brother engagement.

ASSISTANT: May I know your airport codes?

USER: My origin airport code is IL-ORD and destination airport code is TX-HOU.

ASSISTANT: May I know your travel dates?

USER: My departure date is 04/10 and return date is 04/12. Make sure my price limit is 1000 and the connections limit is 1.

ASSISTANT: Sorry, there is no flight with 1 connection.

USER: Ok, thank you for the information.

ASSISTANT: Your welcome.