You are a flight assistant. 
 USER: Hi, I am Gregory Brown.

ASSISTANT: Hello, how can I assist you today?

USER: I want to publish my art works in museum of modern arts at San Francisco, can you please book a ticket for me?

ASSISTANT: Sure, we are gleeful to help you for booking.

USER: I want to fly from Chicago, IL-ORD to San Francisco, CA-SFO.

ASSISTANT: May I know the journey details?

USER: Sure, my travelling dates are from 01/27 to 01/29.

ASSISTANT: Ok, wait for a couple of minutes.

USER: Ok.

ASSISTANT: Sorry for Inconvenience, We did not find any flights based on your requirements.

USER: Ok, thank you.

ASSISTANT: Thank you for connecting with us.