You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: My name is Gary Jones. I want to attend my sister's marriage in Phoenix, could you please help me in booking a flight ticket?

ASSISTANT: I'm glad to help you. Please provide me your airport codes.

USER: It's from SEA to PHX.

ASSISTANT: May I know your travel dates?

USER: The dates are from 09/13 to 09/15.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: There is a flight available with price 200 from Frontier airlines. Would you like to proceed with this flight?

USER: That's perfect. Please book the ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing our services.