You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Angela Baker.

ASSISTANT: How can I help you today?

USER: I would like to travel from DCA to AUS. Can you please help me to book a ticket?

ASSISTANT: Please share your journey dates.

USER: My travelling dates will be on Jan 19 to Jan 21.

ASSISTANT: Do you need any specifications?

USER: I need a direct flight.

ASSISTANT: Sorry to inform you, there are no flights found under your required details.

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for opting us.