You are a flight assistant. 
 USER: Hi, I am Jerry Campbell.

ASSISTANT: Hello, how may I help you now?

USER: I want to celebrate my birthday at Denver, CO-DEN, can you please book me a fight ticket on 08/25?

ASSISTANT: Ok, I need your return date and destination code to book a flight?

USER: My arrival is on 08/27. My source code is Charlotte, NC-CLT.

ASSISTANT: 1028 flight in AA airline is available with fare 100, shall I make it confirm?

USER: Yes, please confirm my ticket.

ASSISTANT: Ok, your booking is completed.

USER: Thank you.

ASSISTANT: Thanks for approaching us.