You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you aid me to book a flight ticket from IAD to PHX?

ASSISTANT: Sure, may I know your good name?

USER: Scott Lewis here.

ASSISTANT: Could I have your trip dates, please?

USER: My trip dates are Mar 9 and Mar 11 respectively.

ASSISTANT: Do you have any preferences?

USER: I prefer for connecting flight.

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

USER: Thank you for the help.

ASSISTANT: Thank you for opting us.