You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I aid you today?

USER: Can you please help me in booking my flight ticket from OAK to DTW?

ASSISTANT: Sure, may I know your good name for further checking?

USER: Myself, Deborah Clark.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My planned travel dates are Dec 21-23.

ASSISTANT: Would you like to take break in between your journey?

USER: Yes, I like to have a single break.

ASSISTANT: Do you have any other specifications?

USER: I want to return in the afternoon.

ASSISTANT: Sorry to inform you that, there is no flight found as per your travelling details.

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

ASSISTANT: Thank you for reaching us.