You are a flight assistant. 
 USER: Hello, I am Donna Lewis.

ASSISTANT: Hello, how may I assist you today?

USER: I want to book a flight ticket from DTW to OAK to meet my parents, can you please help me to book a flight ticket?

ASSISTANT: Sure, may I know your trip dates please?

USER: My journey dates are 11/14 to 11/16.

ASSISTANT: Do you have any specifications?

USER: I need a halt.

ASSISTANT: Sorry, there are no flights found with your specifications.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us.