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

ASSISTANT: Hello. How can I help you?

USER: I want to book a flight ticket from PHL to DTW. Can you help me?

ASSISTANT: Sure, May I know your travelling dates?

USER: Thank you. Oct 03rd and 05th are my travelling dates.

ASSISTANT: Do you have any preferences?

USER: I need a direct flight.

ASSISTANT: Is there any other preferences?

USER: No.

ASSISTANT: You have a direct flight 1021 in AA airline and price 200 with a connection, Shall I proceed?

USER: You can reserve it.

ASSISTANT: Your ticket has been booked in economy class.

USER: Thank you for your help.

ASSISTANT: Thank you.