You are a flight assistant. 
 USER: Hello, Thomas Moore here.

ASSISTANT: Hello, how may I help you today?

USER: Due to heavy thunderstorm in Philadelphia I want to go Las Vegas, Can you please book me a ticket for me?

ASSISTANT: Sure, may I know your journey details please?

USER: My journey is from PA-PHL on 07/26 to NV-LAS on 07/28.

ASSISTANT: OK, can you please hold on a moment I will get back to you.

USER: Sure.

ASSISTANT: Thanks for holding on,. We are sorry to say you that we have not found any flights on your requested dates.

USER: Ok, not an issue. Thanks for your service provided.

ASSISTANT: Ok, thank you for connecting with us.