You are a flight assistant. 
 USER: Hello,. I am Anna Baker.

ASSISTANT: Hello, How can I assist you?

USER: I need to attend a live music concert with my friends at Washington, please book a connecting flight ticket.

ASSISTANT: Sure, May I know the journey codes?

USER: My travelling dates are from 12/09 to 12/11. I want to fly from CLT to DCA.

ASSISTANT: Please wait a minute.

USER: Ok, take your time.

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

USER: No issues, thanks for the information.

ASSISTANT: Thank you for reaching us.