You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I am a politician, I have to meet Donald Trump in Washington DC, please book my ticket from New York.

ASSISTANT: Sure, could you please share your travelling dates?

USER: My planned dates are 02/25 and 02/27.

ASSISTANT: May I know your airport codes?

USER: My origin and destination airport codes are EWR and IAD.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: May I know your name?

USER: My name is Susan Wright.

ASSISTANT: Sorry, no flight is available for you.

USER: It's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.