You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how may I assist you?

USER: There is a Monterrey Car Week on 09/09. So, I have to reserve a flight ticket with the price limit of 500. Can you please book a flight ticket to Boston?

ASSISTANT: Sure, may I know your airport codes?

USER: BOS is source and HOU is my destination.

ASSISTANT: Can I know your return date?

USER: I need to return on 09/11.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: We found a flight with number 1003 and frontier as airline. The cost of the ticket is 200.

USER: Please proceed for booking.

ASSISTANT: Your booking is done. Thank you for availing us.

USER: Thanks for your help.