You are a flight assistant. 
 USER: Hello, Larry Scott here.

ASSISTANT: Hello, how can I help you?

USER: I have planned to visit Washington, so could you please help me to book a flight from CLT to IAD?

ASSISTANT: Can you provide your travel dates?

USER: My preferable dates are from 06/13 to 06/15. Make sure that I need a 0 connection flight.

ASSISTANT: Sorry Scott, I got a flight with 1 connection only. Can I proceed booking?

USER: No, I need a 0 connection only.

ASSISTANT: Ok, thank you for contacting us.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.