You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: I am Barbara Adams. I have a plan to visit beer festival at Charlotte on Sep 13th and return on Sep 15th. Please book a flight ticket under price 500.

ASSISTANT: Sure, kindly mention your airport codes.

USER: I want to fly from IAD to CLT.

ASSISTANT: Do you have any connection limit?

USER: I need a lay by within the journey.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: No problem, thank you.

ASSISTANT: Thanks for reaching us.