You are a flight assistant. 
 ASSISTANT: Hello, how could I help you?

USER: Hi, I am Ronald  Roberts.

ASSISTANT: How may I assist you?

USER: I would like to head from Dallas & Fort Worth, TX - DFW on 06/04 to meet my grandparents in New York, NY - LGA. Can you me book me a flight ticket?

ASSISTANT: May I know the arrival date?

USER: Sure, I want to catch a return flight on 06/06.

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

USER: Ok, thank you.

ASSISTANT: Thank you.