You are a flight assistant. 
 USER: Hi. I am Angela Lewis.

ASSISTANT: Hello, how may I support you today?

USER: I am planning to attend a seminar which is held on 02/26, so I want to book a flight ticket on 02/25 from Philadelphia. Can you help me with it please?

ASSISTANT: Sure, I am here to help you. May I know your return date please?

USER: Thank you, I would like to return on 02/27.

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

USER: Yes, my airport codes are PA-PHL and Chicago, IL-ORD.

ASSISTANT: Do you need a halt in between your journey?

USER: Yes, I need a halt in between the journey.

ASSISTANT: OK, please wait for a while, I will check and revert to you.

USER: Ok, take your time.

ASSISTANT: Thanks for waiting. W e found 1016 flight an Delta airline with single connection and fare is 100. Shall I proceed to book?

USER: Yes, please proceed with booking.

ASSISTANT: Your ticket has been booked with your name.

USER: Thank you.

ASSISTANT: Thank you for choosing us, have a safe journey.