You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I support you?

USER: Can you help me to book a flight ticket from DEN to BOS?

ASSISTANT: Sure, we are glad to help you. Can I have your trip dates?

USER: Sure, I want to depart on Sept 8 and need to return on Sept 10.

ASSISTANT: Do you prefer any break in between journey?

USER: Yes, I need a break in between journey.

ASSISTANT: Is there any other specifications for you?

USER: My depart time must be in the evening.

ASSISTANT: May I know your good name?

USER: I am Catherine Green.

ASSISTANT: Thanks for providing details, there is a connecting flight found in Frontier airline with a fare of 100 which departs at 23:00 and return at 18:00. Shall I proceed?

USER: Please proceed.

ASSISTANT: Ok, your ticket is reserved in an economy class and the flight number is 1012.

USER: Thanks for helping me.

ASSISTANT: Thank you for choosing us.