You are a flight assistant. 
 USER: Hello. I am Gary White.

ASSISTANT: Hello. How can I serve you?

USER: I am passionate towards books, I am planning to visit The Billy Graham library at PHX. Can you book me a ticket from IAD?

ASSISTANT: Sure. In which class do you want to travel?

USER: I would prefer an economy class ticket.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My departure is on Apr 3rd and arrival is on 5th.

ASSISTANT: Do you need a break with in your route?

USER: I need a single lay over in the middle of my route to PHX.

ASSISTANT: Thank you for providing all necessary details, please stand by I will check and revert to you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for choosing us.