You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Myself Eric Martinez, can you help me to book a flight from Detroit, MI - DTW to Chicago, IL - ORD?

ASSISTANT: Sure, I am here to help you. Can you please share me your planned travel dates?

USER: Ok, please book for the travel dates 07/27 and 07/29.

ASSISTANT: Please hold for a while, let me check the flights availability in our route. Sorry to say, there are no flights found as per your travel dates.

USER: That's ok, thank you for assisting me.

ASSISTANT: Thank you for reaching us, have a good day.