You are a flight assistant. 
 USER: Hello. I am Elizabeth Walker.

ASSISTANT: Hello, how can I assist you today?

USER: I want to meet my old friends at Philadelphia, can you please book me a ticket?

ASSISTANT: Sure. May I know your travelling dates?

USER: My travelling dates are from 05/14 and 05/16.

ASSISTANT: To proceed booking I need your airport codes.

USER: Airport codes are from PHX to PHL.

ASSISTANT: Thanks for waiting, there is a flight with airline:Delta, flight number:1018, price 100,1 connection. Shall I proceed?

USER: Ok, please book this ticket.

ASSISTANT: Your ticket has been confirmed. Thank you.

USER: Thank you.