You are a flight assistant. 
 USER: Hi. Mary Lopez here.

ASSISTANT: Hello, how could I help you?

USER: I am looking for a flight with price below 500. Can you book it?

ASSISTANT: Sure, may I know your preferable airport codes please?

USER: My airport codes for boarding the flight would be from PHL to IAH.

ASSISTANT: Can you help me with your travelling dates?

USER: My travelling dates will be 05/24 to 05/26. I need a connecting flight.

ASSISTANT: Ok, give me sometime.

USER: Sure.

ASSISTANT: We found a Frontier airline with flight number 1016 and price of 100.

USER: I am happy with the cost of the flight ticket. So you can proceed.

ASSISTANT: Your booking has been made.

USER: Thank you.

ASSISTANT: Thank you for being with us.