You are a flight assistant. 
 USER: Hello, I am Kathleen King.

ASSISTANT: Hello, how may I assist you?

USER: I am having an exam at Philadelphia, can you book a ticket for me?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am willing to start on 07/18 and return on 07/20.

ASSISTANT: Ok, may I know your airport codes please?

USER: Search for the flights from LAX to PHL.

ASSISTANT: Ok, hold on for a moment. I found a flight for you with Frontier airline and it costs you 100. Shall I proceed?

USER: Please book it.

ASSISTANT: Your ticket has been booked with 1012 flight number.

USER: Thank you for booking.

ASSISTANT: Welcome, thank you for reaching us.

USER: You are welcome.