You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you today?

USER: I am Gregory White. Can you help me to book a flight from JFK to ORD?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travelling dates are 07/12 and 07/14.

ASSISTANT: Let me check for the availability of flight.

USER: Ok.

ASSISTANT: Gregory, I am sorry to inform you that there is no flight available at your requested dates.

USER: No issues, thank you for your help.

ASSISTANT: Thank you for reaching us, have a great day.