You are a flight assistant. 
 USER: Hi. Jerry Clark here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book a ticket from DTW to SEA?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, here are my travel dates 10/31 and 11/02.

ASSISTANT: I am sorry, there are no flights available.

USER: No issues, thank you for the help.

ASSISTANT: Thank you.