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

ASSISTANT: Hello, how can I assist you?

USER: I would like to participate in mobile food distribution event at Philadelphia, PA - PHL. Can you please book a ticket with price 200?

ASSISTANT: Sure, when are you planning to travel?

USER: My travelling dates are on 02/07 to 02/09.

ASSISTANT: Please provide your origin airport code.

USER: My origin is Denver, CO - DEN.

ASSISTANT: Delta airlines with single connection and price is 100 of 1014 flight.

USER: Ok, please proceed for booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thanks for booking.

ASSISTANT: Thank you.