You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Please book me a ticket from OAK to DTW.

ASSISTANT: Sure, may I know your travel dates?

USER: My planned dates are from 02/22 to 02/24.

ASSISTANT: Do you have any specifications?

USER: Yes, there should be a connection in between my journey.

ASSISTANT: Ok, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no connecting flight available from your source.

USER: Fine, thanks for the information.

ASSISTANT: May I know your name?

USER: I am Mary Garcia.

ASSISTANT: Thank you.