You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Patricia Lee. Could you please help me to do flight ticket reservation? Because this is the first time I am looking to reserve a flight ticket.

ASSISTANT: Yes, I can help you with that. Do you have any idea on the airport codes? If yes, please provide me the codes.

USER: Thank you. I have an idea about the airport codes, those are PHL and ORD.

ASSISTANT: Ok, may I know your travelling dates to search for the flight?

USER: The travel dates are 11/08 and 11/10.

ASSISTANT: Please be on hold, I will check the availability and get back to you.

USER: Ok, please make sure that the price limit is 500 or less.

ASSISTANT: Ok, there is a flight 1015 in Delta airline matching your details with price 100. Shall I proceed?

USER: Yes, please book the ticket with this flight airlines.

ASSISTANT: Ok, your booking is done.

USER: Thank you for helping me in ticket booking.

ASSISTANT: You are welcome.