You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Katherine Wilson here. Can you please book a flight ticket from LAX to JFK?

ASSISTANT: Sure, can I know your travel dates?

USER: Sure, I need to travel on dates of 07/10 and 07/12.

ASSISTANT: Please give me a minute.

USER: Sure, take your time.

ASSISTANT: The flight 1007 of Delta airlines is available on your requested dates with a price of 300 .

USER: I need flight ticket with fare of 200 so please recheck with that.

ASSISTANT: Sorry, there is no flight available on your request.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: You are welcome.