You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: Jeffrey Turner here.

ASSISTANT: How can I assist you today?

USER: I would like to go for a 3 days trip to Philadelphia, PA - PHL. Can you help me in booking flight ticket?

ASSISTANT: Sure. Can you provide me your origin point and travelling dates?

USER: I want to fly from Las Vegas, NV - LAS. My travelling dates are 08/26 and 08/28.

ASSISTANT: Ok, Wait for a while.

USER: OK.

ASSISTANT: Thanks for waiting. Unfortunately, There is no flight found with your specified request.

USER: OK, not an issue. Thanks for your time.

ASSISTANT: Thank you for availing us.