You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Can you help me to book ticket from PHL yo ORD?

ASSISTANT: Please share your travelling dates.

USER: My trip dates are Apr 18 and Apr 20.

ASSISTANT: Do you need any connection limit?

USER: I need a connecting flight.

ASSISTANT: Can you share your timings?

USER: I do not have any particular timings.

ASSISTANT: May I know your name?

USER: I am Nicholas Thompson.

ASSISTANT: Do you have any other specifications?

USER: I prefer to travel in economy class.

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

USER: Sure, you can proceed.

ASSISTANT: Your ticket is reserved with flight 1004.

USER: Thank you for booking.

ASSISTANT: Thank you for choosing us.