You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you please reserve a flight ticket with the name Anna Robinson?

ASSISTANT: Sure, May I know the travel dates?

USER: I want to fly on 08/20, my return date will be 08/22.

ASSISTANT: Please help me with your journey codes.

USER: I want to attend a prayer in Las Vegas Nevada temple so I want to land at NV-LAS, I want to start from Detroit MI-DTW.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: Its ok, thank you for your effort. I will find out alternative.

ASSISTANT: Thank you for opting us.