You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please book a flight ticket on dates May 02 and May 04.

ASSISTANT: Sure, please provide your airport codes.

USER: My airport codes are SEA and DEN.

ASSISTANT: Do you have any preferences?

USER: I want to return in the evening.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Barbara Carter.

ASSISTANT: Flight-1012 is available in Hawaiian airlines with single connection and the ticket fare is 100. Can I proceed?

USER:       Yes, please.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.