You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please reserve me a flight ticket from DEN to BOS?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travelling dates are May 28 and May 30.

ASSISTANT: Do you need any break?

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

ASSISTANT: May I know your name?

USER: I am Anthony Moore.

ASSISTANT: Is there any other preferences that you would like to add before booking?

USER: No.

ASSISTANT: Thank you for providing all necessary details. Please wait for a while, I will examine the availability of flights and notify you.

USER: Sure.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.