You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Rebecca Perez.

ASSISTANT: How can I aid you the best today?

USER: I need to book a flight ticket on 12/20 to meet my parents.

ASSISTANT: Ok.

USER: Could you please help me with booking  flight ticket?

ASSISTANT: Sure, I will help you with that. When will be your return date?

USER: I intend to return on 12/22.

ASSISTANT: Kindly assign your travelling airport codes?

USER: Sure, PA-PHL and MI-DTW are my airport codes.

ASSISTANT: Is there any restrictions on the ticket fare?

USER: I can pay up to 5000.

ASSISTANT: Ok, please wait. Let me search you the flight. Thank you for your time, we have found a Delta airline, flight number-1024 connections-1 and ticket fare is 100.

USER: You can proceed with booking.

ASSISTANT: Your ticket has been confirmed.

USER: Thank you for your service.

ASSISTANT: Thanks for your presence.