You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Will you help me in booking the flight ticket from JFK to PHL?

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

USER: My journey dates are 11/28 and 11/30.

ASSISTANT: May I know your name to proceed further?

USER: Myself Gregory Collins.

ASSISTANT: Let me check for the availability of flight. Gregory, I am sorry to inform you that there is no flight available at your requested dates.

USER: Ok, not an issue. Thank you for your information.

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