You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me to search a flight with 0 connection limit?

ASSISTANT: Ok, may I know your travelling dates?

USER: The travelling dates are from 03/31 to 04/02.

ASSISTANT: Help me with the origin and landing airport codes.

USER: The origin is from TX-IAH and the landing airport code is IL-ORD.

ASSISTANT: May I know your name?

USER: Sure, my name is Charles Collins.

ASSISTANT: Sorry, there is no flight found on your requested dates.

USER: No problem, I will search another way to complete my trip.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.