You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a ticket from OAK to PHL. Could you book a ticket?

ASSISTANT: Sure, let me know your trip dates?

USER: Trip dates are June, 15 and June, 17.

ASSISTANT: Do you have any connection limit?

USER: I would be comfortable with single stop over.

ASSISTANT: Is there any other specifications?

USER: I prefer to fly in a normal-cost airlines.

ASSISTANT: May I know your good name?

USER: My name is Charles Evans.

ASSISTANT: We found a connecting flight 1005 in American airline with fare 100 and class is economy. Shall I proceed?

USER: Please book a flight.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you.

ASSISTANT: Thank you.