You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you now?

USER: Gregory Perez here. I want to book a flight ticket from DCA to PHX. Can you help me in that?

ASSISTANT: Ok, please mention your planned dates for this trip.

USER: My trip dates are Jan 26 to Jan 28.

ASSISTANT: May I know your depart and arrival time?

USER: My depart time should be in the afternoon.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Gregory Perez, there is no flight currently available for your journey.

USER: Ok, no problem.

ASSISTANT: Thank you for connecting with our services.

USER: Thank you.

ASSISTANT: Have a nice day.