You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Raymond Lewis here.

ASSISTANT: How can I assist you today?

USER: I would like to visit Seattle for a business trip, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, can you please share your preferable travel dates?

USER: Sure, I am planning to go on 09/15 and please book my return ticket on 09/17.

ASSISTANT: Could you please provide the airport codes?

USER: I want to travel from DEN to SEA.

ASSISTANT: Ok, let me check for the availability of flight.

USER: Sure, take your time to check.

ASSISTANT: Raymond, there is a flight available with price 100 and the connection is 1 with Spirit airline. Would you like me to proceed with the booking?

USER: Everything is fine for me, you can proceed with booking.

ASSISTANT: Your booking is confirmed with 1000 flight number.

USER: Thank you for your help.

ASSISTANT: Thank you for opting us.

USER: Most welcome.