You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Dennis Lopez here. I am a war veteran, I have an invitation to meet Donald Trump at Washington DC, could you book my ticket from Los Angeles?

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

USER: My itinerary dates are Feb 3 and Feb 5.

ASSISTANT: Could you please help me with the airport codes?

USER: My genesis and terminus airport codes are LAX and IAD.

ASSISTANT: Do you have any class preference?

USER: I prefer economy class.

ASSISTANT: Dennis Lopez, there is a flight available with price 200 and the connection is 0 with Delta airline. Would you like me to proceed with the booking?

USER: Please proceed to book my ticket.

ASSISTANT: Your booking is confirmed with 1024 flight number.

USER: Thank you for your service.

ASSISTANT: You are welcome. Thank you for reaching us.