You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I would like to book a flight ticket on 04/20 to meet my office partner to discuss about the present situation going on, is there any flight available from LAS?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Can I have airport code of your destination and return date?

USER: Yes, I will return back from JFK location on the date 04/22.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that no flight is available to you on your dates.

USER: Sad to hear that one but it's fine.

ASSISTANT: May I know your name please for documentation purpose?

USER: Sure, my name is Emma Phillips.

ASSISTANT: Ok, thank you for choosing us, have a great day.

USER: Thank you for your help.

ASSISTANT: Welcome.