You are a flight assistant. 
 ASSISTANT: Hello.

USER: Hello. I am Emma Walker.

ASSISTANT:  Emma Walker. How can I help you?

USER: I am planning to visit Millennium Park at Chicago, could you please help me with booking a flight ticket from SFO to ORD?

ASSISTANT: Sure, May I know itinerary travel dates?

USER: I would like to depart on May 10th and return on May 12th.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight. And make sure that my depart time is afternoon.

ASSISTANT: Give me a moment.

USER: Sure, take your time.

ASSISTANT:  American Airlines with flight 1024 is providing service on your route.

USER: Ok, please confirm the booking.

ASSISTANT: Your ticket is booked in the economy class with the cost of 300.

USER: I really appreciate your help, thank you for your service.

ASSISTANT: Thank you for reaching us.