You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you now?

USER: Can you book me a ticket in normal cost airline?

ASSISTANT: Sure, may I know your airport codes please?

USER: I need to reach PHL to attend a conference and will be leaving from DTW.

ASSISTANT: Let me know your travel dates, please.

USER: I would start on Sept 12 and return on Sept 14.

ASSISTANT: Do you have any connection limit?

USER: Yes, I need 1 lay by.

ASSISTANT: Do you have any airline preference?

USER: I have already mentioned that I need a normal cost airline.

ASSISTANT: Provide me your class preference, if any.

USER: I am fine with any class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Please, let me know your name to proceed further.

USER: I am Thomas Lopez.

ASSISTANT: American Airlines is providing you the connecting flight in economy class, shall I proceed?

USER: Fine, please proceed.

ASSISTANT: Your ticket has been reserved with flight 1004, with a price of 200.

USER: Thanks for your support.

ASSISTANT: Thank you for opting us.