You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Gary Martinez here.

ASSISTANT: Yes, Gary.

USER: I would like to visit New York, can you book ticket please?

ASSISTANT: Sure, please provide me your travelling details?

USER: I want to fly from ORD to JFK.

ASSISTANT: May I know your probable dates of travelling?

USER: My journey dates are 01/22 and 01/24.

ASSISTANT: Please, wait a moment.

USER: Ok.

ASSISTANT: Sorry Gary, there is no flight with your requirement.

USER: No problem, thanks for checking.

ASSISTANT: Welcome.