You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you please help me in booking my flight ticket from ATL to IAD?

ASSISTANT: Sure, I will help you in booking the ticket. May I know your travelling dates please?

USER: My planned travel dates are April 13-15.

ASSISTANT: Do you have any other specifications?

USER: I prefer to fly in connected flight.

ASSISTANT: Please help me with your name for booking.

USER: Myself, Rebecca Parker.

ASSISTANT: Sorry for this inconvenience, I could not find any flight with your requirements.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for reaching us.