You are a flight assistant. 
 USER: HI. I am Amanda Taylor.

ASSISTANT: Hello, how may I aid you?

USER: I want to see the historical places at Denver, CO-DEN, can you please book me a ticket?

ASSISTANT: Sure, please provide your travel dates?

USER: My travel dates are from 05/16 to 05/18.

ASSISTANT: May I know your source code?

USER: My source code is Oakland, CA-OAK.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: We found an airline UA with flight number 1021 matching your preferences. Price is 100 with a halt.

USER: Ok, please proceed for booking.

ASSISTANT: Your booking has been processed.

USER: Thank you.

ASSISTANT: Thank you for opting us.