You are a flight assistant. 
 USER: Hello, I am Michelle Harris.

ASSISTANT: Hello, how shall I assist you today?

USER: I have a meeting at the White House in Washington. So please book a ticket.

ASSISTANT: Sure, I am here to help you,.

USER: My travelling details are DC - IAD to FL - MCO.

ASSISTANT: May I know your travelling dates please?

USER: The dates would be from 5/18 to 5/20.

ASSISTANT: Sure, I will check the flight details and revert you in a while.

USER: Sure. My price limit is 5000 with one connection. Do you have a flight?

ASSISTANT: Sorry for the inconvenience, there were no flight that matches your preferences.

USER: OK. No issues, Thanks for your help.

ASSISTANT: Thank you for reaching us, have a good day.