You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Donald Taylor. I would like to book a ticket from DTW to IAD, can you please help me out?

ASSISTANT: Ok, may I know your trip dates?

USER: I am travelling on these dates 01/01 and 01/03.

ASSISTANT: Sorry, no flights found on your preferable dates.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for reaching us.