You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I assist you today?

USER: I am Sandra Phillips from Los Angeles.

ASSISTANT: Ok.

USER: I have planned to go for a trip with my family to MI - DTW. Could you please help me to book a ticket on 01/29?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your source code please?

USER: Sure, My journey starts from CA - LAX.

ASSISTANT: When you are return from your journey?

USER: I intend to return on 01/31.

ASSISTANT: Sorry, there are no flights found with your specifications.

USER: Ok, not an issue. Thanks for the information.

ASSISTANT: Thank you for reaching us.