You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you for the day?

USER: I am Pamela Johnson. Can you please book me a ticket with the fare of 500?

ASSISTANT: Sure, can you please share your journey dates?

USER: I would like to leave between 10/08 and 10/10.

ASSISTANT: Kindly ensure your journey points?

USER: From DTW to ORD.

ASSISTANT: Ok, please wait for a while.

USER: Ok.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details. Thank you for reaching us. Have a good day.

USER: Ok, no problem. Thanks for your service.