You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I need to book a flight ticket from IAD to ATL, Can you please help me for booking?

ASSISTANT: Sure, please provide your travel dates.

USER: I would like to travel on 03/15 to return on 03/17.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight.

ASSISTANT: Is there any class concern?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, my name is Andrew Wilson.

ASSISTANT: sorry, I did not find any flights for you.

USER: No issues, thank you.

ASSISTANT: Thank you for reaching us.