You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jason Parker here.

ASSISTANT: Jason, how can I help you?

USER: Can you please help me in ticket booking?

ASSISTANT: Yes, I can help you. Please provide me your journey details so that I can proceed.

USER: From DFW to JFK.

ASSISTANT: Can you tell me your journey dates?

USER: From 08/02 to 08/04.

ASSISTANT: Ok, let me check.

USER: Ok.

ASSISTANT: Sorry to say, there is no flight for you.

USER: It's ok.

ASSISTANT: Thank you for reaching us.Have a good day.