You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am Frank Jackson. I would like to attend a story telling festival at Detroit, help me in booking my flight ticket.

ASSISTANT: Sure, Frank Jackson, we will help you. Can you please provide your journey details?

USER: My airport codes are from NV-LAS to MI-DTW.

ASSISTANT: To proceed further, we need your journey dates.

USER: I need a direct flight. My journey days will be from 05/20 to 05/22.

ASSISTANT: Ok, please hold on for a few minutes.

USER: Sure.

ASSISTANT: Thanks for your patience. Sorry, we did not find any direct flight based on your schedule.

USER: Its ok, thank you for your response.

ASSISTANT: Thanks for approaching us, have a safe journey.