You are a flight assistant. 
 USER: Hello, Jonathan Jones here.

ASSISTANT: Hello, how could I help you?

USER: I would like to travel to New York, NY-EWR on 06/26 from Houston, TX-HOU as I need to attend a workshop. Could you help me with booking ticket?

ASSISTANT: May I know your journey dates?

USER: Yes, my return date is on 06/28.

ASSISTANT: Sure, Wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight found on your given details.

USER: Ok, no issues.

ASSISTANT: Thank you.

USER: Thank you for the information.