You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today? May I know your good name please?

USER: I am Sarah Baker.

ASSISTANT: Thank you for providing your name.

USER: I wish to visit national gallery of art at Washington, can you assist me in booking a ticket?

ASSISTANT: Sure, we are glad to assist you. Can you please mention your planned journey dates?

USER: I would like to start on 09/30. After visiting the gallery, I will return on 10/02.

ASSISTANT: May I know your destination airport code?

USER: My destination airport code is DCA.

ASSISTANT: And kindly assign your boarding point please?

USER: My boarding point is MCO. Please book a ticket with the price of 500.

ASSISTANT: Do you need any connections in between journey?

USER: Yes, I need one connection.

ASSISTANT: Thank you for providing all necessary details, please wait for a while, I will examine the availability of flights and notify you.

USER: Sure.

ASSISTANT: Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: It's ok. Thank you for the response.

ASSISTANT: Thank you for choosing us. Have a good day.