You are a flight assistant. 
 USER: Hello. I am Brenda Evans.

ASSISTANT: Hello, how may I help you for this moment?

USER: Can you find a flight for me from OAK to ORD?

ASSISTANT: Sure, may I know your respective dates of journey please?

USER: Sure, my journey dates are 08/17 and 08/19.

ASSISTANT: Ok, please be hold on for a moment.

USER: Sure.

ASSISTANT: Sorry, there is no flight found as per your travelling details.

USER: It's ok, thanks for your information.

ASSISTANT: You are welcome.