You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I need to attend conference on environment in Denver, CO - DEN. Can you book a ticket for me?

ASSISTANT: Sure, please provide your travel dates?

USER: 12/11 and 12/13 are my travel dates.

ASSISTANT: May I know your source code?

USER: Philadelphia, PA - PHL is my source code.

ASSISTANT: Ok, please wait a moment.

USER: OK.

ASSISTANT: We found an airline JetBlue with fare 200 having a halt. Shall I proceed with flight 1008?

USER: Yes, please proceed.

ASSISTANT: On which name would you like me to book your ticket ?

USER: Please book on the name of Daniel Miller.

ASSISTANT: Ok, your booking is under process.

USER: OK.

ASSISTANT: Your booking has been done.

USER: Thank you so much.

ASSISTANT: Thank you for availing us.