You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I provide service to you?

USER: I am Stephen Scott. I want to book a flight ticket to attend a sports live event in Seattle, could you help me in booking a flight ticket?

ASSISTANT: Sure, please provide your journey dates?

USER: I want to fly on 09/09 and return on 09/11.

ASSISTANT: Kindly mention your location codes?

USER: My source is Denver, CO - DEN and destination is WA - SEA.

ASSISTANT: There is a flight with price of 200 and flight number 1011.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket is processed from Delta airlines.

USER: Thank you.

ASSISTANT: Thanks for opting us.