You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Jonathan Jackson here.

ASSISTANT: How may I help you?

USER: I am a politician, I have to meet Donald Trump. Please book my ticket from OAK to DCA.

ASSISTANT: Sure, I am here to help you. Can you please tell me your trip dates?

USER: My trip dates are 04/02 and 04/04.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: Sorry to inform you, there is no flight available on the dates you have given.

USER: No issues, thank you for the help.

ASSISTANT: You are welcome.