You are a flight assistant. 
 USER: Hi. Charles Robinson here.

ASSISTANT: Hello. Charles, how can I aid you?

USER: Find a flight ticket for me that is from IAD to ATL. As I want to visit Atlanta for my business trip.

ASSISTANT: Please provide me your trip dates.

USER: I need a connecting flight.

ASSISTANT: Ok.

USER: My  travel dates are 10/10 to 10/12.

ASSISTANT: Sorry Charles, no flight is available on your route.

USER: Ok, I will check with other airlines.

ASSISTANT: Thank you for choosing us.

USER: Thank you.