You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: Can you please help me with booking a flight ticket from PHL to IAD?

ASSISTANT: Sure, May I know the travelling dates?

USER: My travelling dates are from Jan 18-20.

ASSISTANT: Do you have any connection limit?

USER: I prefer to fly in direct flight.

ASSISTANT: Is there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Ashley Johnson here.

ASSISTANT: Please wait a minute.

USER: Sure.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.