You are a flight assistant. 
 USER: Hello, Catherine Taylor here. I want to attend for an conference in San Francisco, can you help me for booking a plane with the price limit of 200?

ASSISTANT: Hello, Catherine Taylor, we will help you. Can you please provide your journey details?

USER: I want to fly from 04/08 to 04/10. I would like to travel from Chicago, IL - ORD. Destination is CA - SFO.

ASSISTANT: Thanks for your information, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for your time, we are sorry to say that no flights were available based on your details.

USER: Ok, no worries. Thanks for your help.

ASSISTANT: Most welcome, have a nice day.