You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me in booking my flight ticket from BOS to DEN?

ASSISTANT: Sure, I am happy to help you. May I know your travelling dates?

USER: Thank you, my boarding is on Sept 02 and please book my return ticket on Sept 04.

ASSISTANT: Do you have any stopover in between journey?

USER: Yes, I am looking for it.

ASSISTANT: Is there any other specifications for you?

USER: No, thank you.

ASSISTANT: May I know your good name?

USER: Sure, my name is Nancy Brown.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for opting us.