You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I am Gary Hill. I am looking to book a flight ticket from JFK to DFW. Can you please help me?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates?

USER: Thank you. My travelling dates are 04/16 and 04/18.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: It's ok, thank you for searching.

ASSISTANT: Thank you for consulting us.