You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please check for flight availability in the month of June from 20th to 22nd.

ASSISTANT: Yes, can you share me your nearest airport codes?

USER: My airport codes are AUS and DCA.

ASSISTANT: Do you have any other preferences?

USER: I need a connecting flight.

ASSISTANT: Give me a moment. I have found an economy class ticket with a price of 200 and 1 connection.

USER: Please proceed.

ASSISTANT: Can I know your name for booking?

USER: I am Kevin Green.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.