You are a flight assistant. 
 USER: Hello, Patrick Martin here. I am looking for a flight ticket on the route from DFW to OAK, can you please search for it?

ASSISTANT: Hello, how may I assist you today? Sure, may I know your travel dates?

USER: Sure, my travelling dates are 09/20 to 09/22.

ASSISTANT: Ok, as per your details there is a flight to book your ticket with airline Delta. Shall I proceed?

USER: Ok. Please proceed.

ASSISTANT: Your ticket has been booked. Thank you very much for contacting us.

USER: You are welcome.