You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, may I help you?

USER: I am Donald Martinez. I want to book a flight ticket to attend my friend's bachelor's party in DFW. Can you book a flight ticket with price of 200?

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from 06/30 to 07/02.

ASSISTANT: May I know your source code?

USER: My source code is Los Angeles, CA-LAX.

ASSISTANT: Please wait a minute.

USER: Ok.

ASSISTANT: We found a flight on delta airline, flight number as 1015 with the fare of 100.

USER: Please book my ticket.

ASSISTANT: Your ticket has been booked.

USER: Thank you.

ASSISTANT: Thank you for opting us.