You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I want to book a ticket from ORD to JFK. Could you book a ticket?

ASSISTANT: Sure, I am glad you to help you in booking process. Can you please share your travel dates?

USER: My travel dates are Mar, 10 and Mar, 12.

ASSISTANT: Can you please tell me your name?

USER: My name is Gregory Jackson.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your particular travel dates.

USER: Thanks.

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