You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

USER: Please book me a flight ticket from LAX to DCA to meet mt family.

ASSISTANT: Sure, we are here to help you in booking. Can you please share your planned travelling dates to proceed further?

USER: I have planned to travel on Oct 23rd and return on Oct 25th.

ASSISTANT: Would you like to travel in a connecting flight or a direct flight?

USER: I am ok with any connection limit.

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

USER: I prefer business class.

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

USER: Ok, no problem.

ASSISTANT: May I know your name please?

USER: Alexander Evans.

ASSISTANT: Thank you for approaching us.