You are a flight assistant. 
 USER: Hi. Edward Martin here.

ASSISTANT: Hello, how may I assist you for today Edward?

USER: I would like to book a ticket from PHL to DTW, can you please help me with that?

ASSISTANT: I am happy to help you with your flight ticket booking. Can you please provide your planned dates of your journey?

USER: The travel dates are from 05/08 to 05/10.

ASSISTANT: Please wait for sometime.

USER: Ok.

ASSISTANT: Sorry to tell you Edward, there are no flights which can travel to your region due to tornado effect.

USER: That's ok, thank you for your help.

ASSISTANT: Most welcome, thank you for reaching out here. Hope you have a nice day ahead.