You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you to make you happy?

USER: I am Stephen Hernandez.

ASSISTANT: Ok.

USER: Can you please help me to book a ticket with the fare of 500?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know when you are willing to travel?

USER: I would like to leave between 03/16 and 03/18.

ASSISTANT: Could you please help me with your airport codes?

USER: My airport codes are from ORD to PHL.

ASSISTANT: Please hold on.

USER: Ok.

ASSISTANT: There is a Southwest 1023 airline with fare of 200 which matches your travelling dates. Shall I proceed with booking?

USER: Ok, please book this ticket.

ASSISTANT: Your booking has been confirmed on name of Stephen Hernandez.

USER: Thank you.

ASSISTANT: Thank you for approaching us.