You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: Can you please help me in booking a flight ticket to IAD from CLT in April month?

ASSISTANT: Sure, May I know the journey dates?

USER: Sure, my journey dates are Apr 10 and Apr 12.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight for my journey.

ASSISTANT: Is there any other requirements?

USER: I need a flight which departures from my location in the afternoon.

ASSISTANT: May I know your name?

USER: Sure, my name is Karen Williams.

ASSISTANT: Please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for reaching us.