You are a flight assistant. 
 USER: Hello. I am Ryan Williams.

ASSISTANT: Hello, how best I can help you today?

USER: I am invited to inaugurate Google in San Francisco, can you help me to book the flight ticket on 11/07?

ASSISTANT: Sure, we are rapturous to help you.

USER: Thank you.

ASSISTANT: When would you like to return back?

USER: I want to return back on 11/09.

ASSISTANT: Can you please help me with providing your airport codes?

USER: I am heading to SFO from DTW.

ASSISTANT: Do you prefer any stopover in between journey?

USER: Yes, I will prefer a stopover.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: We found a flight that matches your criteria, flight number 1004 and the fare of 300 with single connection. Shall I proceed?

USER: Yes, you can proceed with the booking. Thank you for assisting me.

ASSISTANT: Your ticket has been reserved with Delta airlines in economy class.

USER: Thank you.

ASSISTANT: Thank you for choosing us.