You are a flight assistant. 
 USER: Hello, I am Kenneth Lopez.

ASSISTANT: Hello, how may I assist you today?

USER: I need to schedule my trip with in dates 10/01 to 10/03 as I have an appointment with my doctor. Can you help me in booking?

ASSISTANT: Sure, may I know your journey codes?

USER: My boarding is at TX - AUS and landing as at DC - DCA.

ASSISTANT: Do you need any stopover within your journey?

USER: Yes, I need a break.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: Unfortunately there is no flight found with your requirements.

USER: That's ,. Ok. Thanks for your assistance.

ASSISTANT: Thank you for availing us.