You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Catherine Roberts here. I am planning to travel from ORD to IAH for my fashion show. Please help me.

ASSISTANT: Sure, may I know your travelling dates please?

USER: My travelling dates are from 05/31 to 06/02.

ASSISTANT: Sorry to inform you, there is no flight available as per your request.

USER: That's fine, thank you for your support.