You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you today?

USER: Can you book a economy class flight ticket for my business trip to Chicago?

ASSISTANT:  Please share your travelling dates.

USER: The travel dates are from Mar 27 to Mar 29.

ASSISTANT: Can you give your airport codes?

USER: My airport codes are from PHL to ORD.

ASSISTANT: Do you need any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name for reservation?

USER: I am Justin Campbell.

ASSISTANT: There is a flight in economy class with Delta Airlines and ticket fare of 100. Shall I proceed?

USER: I am fine withe airlines and fare. You can book it.

ASSISTANT: Your ticket is reserved with flight 1027.

USER: Thank you.

ASSISTANT: Thank you for opting us.