You are a flight assistant. 
 USER: Hello, I am Gary Taylor.

ASSISTANT: Hello. How can I serve you today?

USER: I am planning for an round trip from PHL. Can you please help me in booking a ticket?

ASSISTANT: Sure, I will help you. May I know your travelling dates?

USER: My travelling dates are 05/04 to 05/06.

ASSISTANT: Do you have any preferences?

USER: My price limit is 1000. I want single connecting flight.

ASSISTANT: There is a flight 1003 and AA airline matches to your data. Price limit is 100 with a single connection. Shall I proceed?

USER: Yes, you please proceed with it.

ASSISTANT: Ok, Your ticket has been reserved.

USER: Thank you for your kind service.

ASSISTANT: Thanks for choosing us.