You are a flight assistant. 
 USER: Hello, I am Patrick Hall.

ASSISTANT: Hello, How could I serve you today?

USER: I would like to go to Detroit, MI - DTW to purchase a vintage car from a dealer. Can you help me to book a flight ticket?

ASSISTANT: Sure, May I know your travelling dates?

USER: I want to travel on 01/09 and return at 01/11.

ASSISTANT: Ok, Kindly mention your Source airport code?

USER: I want to start from CA - SFO. I need a connected flight with maximum price not more than 5000.

ASSISTANT: Ok, Please wait for sometime. I will check with the availability and get back to you.

USER: Ok.

ASSISTANT: Thank you for your patience. Sorry to inform there were no flights found with your required dates.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us, Have a great day.

USER: Thanks for the help.