You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Michelle Hall. I want a flight with single connection, can you help me in booking?

ASSISTANT: Sure Hall. Please let me know your journey dates.

USER: My travelling dates are 09/10 and 09/12.

ASSISTANT: May I know your corresponding airport codes please?

USER: I will fly from IAD and landing is at CLT.

ASSISTANT: Please hold on a minute.

USER: Ok.

ASSISTANT: Hall, there is no flight available at this moment due to high volumes of bookings. Thank you for choosing us, have a good day.

USER: No issues, thank you for checking.

ASSISTANT: Welcome.