You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: My name is Ryan Gonzalez.

ASSISTANT: Nice to meet you Ryan.

USER: I am planning to book a flight ticket from 09/10 to 09/12.

ASSISTANT: Ok, may I know your airport codes please?

USER: Sure, my origin and destination codes are SEA to IAD.

ASSISTANT: Ok, hold on for a moment.

USER: Ok.

ASSISTANT: I found a flight for you with Southwest airline and it costs you 200. Shall I proceed?

USER: That's perfect. You can proceed further.

ASSISTANT: Your ticket has been booked.

USER: Thank you for responding.

ASSISTANT: Thank you for reaching us.