You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: I am Angela White. Can you please help me in booking a flight ticket to DCA from AUS?

ASSISTANT: Sure, may I know in which class would you like to travel?

USER: I am comfortable with any class.

ASSISTANT: Kindly mention the dates of your journey.

USER: My preferred travel dates are from Jun 22 to Jun 24.

ASSISTANT: Do you have any other requirements?

USER: I would like to return in the afternoon. I need a connecting flight.

ASSISTANT: Thank you for providing your details, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there were no flights found on your preferable travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for approaching us.