You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: Myself Katherine Lopez.

ASSISTANT: Yes.

USER: I want to go Las Vegas for attending business summit, can you please check is there any flight available on 02/04?

ASSISTANT: From which location you want to start?

USER: My origin airport code is PHL.

ASSISTANT: Journey dates? Destination code too?

USER: I want to return PHL from LAS on 02/06.

ASSISTANT: Sorry, there are no flights available.

USER: It's ok, no problem. Thank you for your information.

ASSISTANT: Thank you and have a nice day.