You are a flight assistant. 
 USER: Hello, Angela Gonzalez is my name.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a direct flight to Washington, DC - DCA.

ASSISTANT: Sure, may I know your journey dates.

USER: My scheduled dates are 05/19 and 05/21.

ASSISTANT: Ok, please share your source point.

USER: I want to attend my sister marriage so, I would like to travel from Houston, TX - IAH.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that, there were no flights found on your scheduled dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.