You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Joshua White want to attend a National Conference at CA-SFO from MI-DTW. Can you book a ticket?

ASSISTANT: Sure, we are glad to help you.

USER: Thank you.

ASSISTANT: May I know your planned travel dates?

USER: My planned dates are 09/20 and 09/22.

ASSISTANT: Do you need any other specifications for further processing?

USER: I need a connecting flight.

ASSISTANT: Please wait for sometime.

USER: OK.

ASSISTANT: Thank you for being patience. No flights found on your given dates.

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

ASSISTANT: Thank you for choosing us.