You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I have a family get together to attend at Washington. Please find any flights available from Houston.

ASSISTANT: May I know your travelling details?

USER: I am planning to travel on dates 01/01 and 01/03 from IAH to DCA.

ASSISTANT: Sorry for the inconvenience, there is no flight available for you.

USER: That's fine.

ASSISTANT: May I know your name please?

USER: My name is James Turner.

ASSISTANT: Thank you for approaching us.

USER: Thank you.