You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you aid me to book a flight ticket from ORD to DTW?

ASSISTANT: Sure, may I know the planned travel dates?

USER: I planned my trip on the dates Dec 25 and Dec 27.

ASSISTANT: Please provide me the specifications.

USER: I am looking for a direct flight with normal cost airline and please check for the evening flight at the time of depart.

ASSISTANT: May I know the name?

USER: Myself John Mitchell.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for reaching us.