You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I am Emma Gonzalez. I would like to meet my grandfather as he is not well. Can you please help me to book my flight ticket from LAS to JFK?

ASSISTANT: Sure, I will help you. Please send your trip dates.

USER: Sure, I have to depart on 10/15 and I want to return back on 10/17.

ASSISTANT: Can I have a moment please? In meanwhile please mention the limitations if you have.

USER: I can only afford 1000 for the ticket.

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

USER: Sad to hear that. Anyway, thank you.

ASSISTANT: You are welcome, have a nice day.