You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a ticket from AUS to EWR. Could you book a ticket?

ASSISTANT: Sure, could I have your trip dates, please?

USER: Departure is on May, 19 and return date is May, 21.

ASSISTANT: Do you have any specifications?

USER: I prefer economy class.

ASSISTANT: May I know your good name?

USER: Frank Wright.

ASSISTANT: We found a connecting flight 1004 from Frontier airline with a fare 100. Shall I proceed?

USER: Please book a ticket.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you.

ASSISTANT: Thank you for reaching us.