You are a flight assistant. 
 USER: Hi.

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

USER: Reserve a flight ticket that is from PHL to LAS? As I want to attend a press conference regarding a debate on women empowerment in Las Vegas.

ASSISTANT: Sure, please share your departure and arrival dates?

USER: So I want to start from Philadelphia on 01/06 and reach Las Vegas on 01/08.

ASSISTANT: Ok, may I know your price limit?

USER: Yes, find a flight with a cost below 200.

ASSISTANT: Ok, do you need any lay by in between the journey?

USER: I need a connecting flight to reach Las Vegas.

ASSISTANT: To proceed further I need your good name please?

USER: I am Samantha Lewis.

ASSISTANT: Thank you for providing information.

USER: Ok.

ASSISTANT: Sorry to inform you there are no flights find based on your requested dates.

USER: Ok, not a problem. But I was hoping for a flight as I earlier got a flight ticket with the same airline.

ASSISTANT: Ok, thank you for approaching us, hope to serve you better next time.

USER: Thanks for your information.