You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ruth Perez here.

ASSISTANT: Ruth, how can I help you?

USER: I am a politician, I want to meet Donald Trump in Washington DC. Please book my ticket from ORD to IAD.

ASSISTANT: Can I know your travel dates?

USER: My itinerary dates are 07/14 and 07/16.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flight is available.

USER: It's ok, thank you for helping me.

ASSISTANT: Thank you for approaching us.