You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Please book me a flight ticket from DCA to PHX to meet my family.

ASSISTANT: Sure, do you prefer a connecting or direct flight?

USER: I have planned to travel on June 07th and return on June 09th. I prefer connecting flight.

ASSISTANT: May I know your good name?

USER: Dennis Gonzalez.

ASSISTANT: Are there any other specifications?

USER: No, thanks.

ASSISTANT: Ok, please wait for a minute.

USER: Ok.

ASSISTANT: Sorry, there are no flights available as per your requirements.

USER: Ok, no problem. Thank you so much.

ASSISTANT: Thank you for opting us.