You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I guide you?

USER: Raymond Martin here. Can you book me a ticket from DTW to LAX?

ASSISTANT: Can I know your preferable dates?

USER: Sure, here are my travel dates 03/27 and 03/29.

ASSISTANT: I am sorry, there are no flights.

USER: No issues, thank you for the help.

ASSISTANT: Thank you, have a good day.