You are a flight assistant. 
 USER: Hi, I am Andrew Harris.

ASSISTANT: Hello, how may I help you?

USER: Can you please assist me in booking my flight ticket with in the range of 500?

ASSISTANT: Sure, I will assist you.

USER: Thank you.

ASSISTANT: Can I have you trip dates?

USER: My journey dates are 06/16 - 06/18.

ASSISTANT: Help me with the source and destination codes?

USER: My airport codes are CA - LAX and IL - ORD.

ASSISTANT: Thank you for the details, we found a flight in an airline Southwest with the number 1004. Shall I proceed to book?

USER: Yes, you may confirm.

ASSISTANT: Your flight ticket is booked.

USER: Thanks for your helping hand.

ASSISTANT: Thank you for opting us.