You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am planning to visit Korean war veterans memorial which is one of the historical place in Washington, IAD. Can you help me to book a flight ticket?

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: Can I know your travelling dates?

USER: My travel dates are Mar 01 and 03.

ASSISTANT: Please share me your starting point of your journey.

USER: I want to start from Orlando, MCO.

ASSISTANT: Do you require  any break?

USER: I prefer to take a break, because one of my friend will meet me in between my journey.

ASSISTANT:  Ok, Is there any other specifications?

USER: No, All my preferences are given. Please check the availability of flights.

ASSISTANT: Ok ,For that I need to know your name. Can you please provide me?

USER: Sure, Donna Green here.

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

USER: Thanks for checking the availability of flights.

ASSISTANT: Thank you for reaching us.