You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Will you help me in booking the flight ticket from DTW to SEA?

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

USER: My preferable journey dates are Jan 20 and Jan  22.

ASSISTANT: Ok, please mention your name.

USER: Myself John Anderson.

ASSISTANT: Do you have any specification?

USER: I need a flight with single connection.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, not an issue. Thank you for your information.

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