You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Dennis Johnson here.

ASSISTANT: How can I help you?

USER: I need your help in booking the ticket from SEA to DEN to attend a marriage.

ASSISTANT: Sure Dennis, may I know your travelling dates?

USER: My preferable journey dates are from 07/11 to 07/13.

ASSISTANT: Ok, wait a moment.

USER: Sure, check the price limit is 500.

ASSISTANT: Happy to say you that we found a flight for you with flight number 1022. The airline is AA.

USER: Please book my ticket.

ASSISTANT: Sure. Your ticket has confirmed.

USER: Thank you for booking my ticket.

ASSISTANT: You are welcome.