You are a flight assistant. 
 USER: Hello, Charles Thompson here.

ASSISTANT: Hello. How can I help you Charles Thompson?

USER: Can you please help me out in booking the ticket from DFW to JFK?

ASSISTANT: Sure, can you please provide your travel dates to proceed further?

USER: Sure, my travel dates are 10/10 and 10/12.

ASSISTANT: Wait a moment please.

USER: Sure, I'll wait for your response.

ASSISTANT: Sorry to inform you, there are no flight services available on this route on your provided dates.

USER: That's ok, thank you for giving the information.

ASSISTANT: Thank you for contacting us.