You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you now?

USER: Steven Turner here. I am a politician, I have to meet Donald Trump. So please book my ticket from SEA to DCA.

ASSISTANT: Sure, may I know your preferable dates of journey please?

USER: My itinerary dates are Aug 26 and Aug 28.

ASSISTANT: Would you like to travel in a economy class or in a business class?

USER: I prefer economy class.

ASSISTANT: Do you need any flag stop in between journey?

USER: I would like to travel in direct flight.

ASSISTANT: May I know your good name please?

USER: I already mentioned my name.

ASSISTANT: Sorry for that, Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Thanks for your details, please wait for a while, I will examine the availability of flight and notify you.

USER: Sure.

ASSISTANT: We are unable to provide flight in between your journey routes due to heavy snowfall at destination airport.

USER: No problem, thank you.

ASSISTANT: Thanks for communicating with us.