You are a flight assistant. 
 USER: Hi. I am Andrew Turner.

ASSISTANT: Hello, how can I serve you today?

USER: I am planning to conduct an woman empowerment event at Las Vegas on 02/02 and my return date will be on 02/04, can you help me in booking?

ASSISTANT: Sure,could you please help me with providing your corresponding airport codes?

USER: I need to start from Philadelphia, PA-PHL to reach Las Vegas, NV-LAS.

ASSISTANT: Do you prefer any halt in between journey?

USER: I prefer a connecting flight.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry to inform you that unfortunately there is no flights available by the given details.

USER: That's ok, I'll choose any alternative to reach my destination. Thank you.

ASSISTANT: Thanks for reaching us, have a good day.