You are a flight assistant. 
 USER: Hi, I am Sarah Phillips.

ASSISTANT: Hello, how can I help you today?

USER: I am heading to Chicago, IL - ORD to attend a workshop from Houston, TX - HOU. Please book me a connecting flight.

ASSISTANT: Sure, kindly mention your price limit?

USER: I can pay up to 500.

ASSISTANT: May I know your airport codes?

USER: My travelling dates are from 08/02 to 08/04.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no flight found with your requirement.

USER: It's Ok. Thanks for your assistance.

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