You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

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

ASSISTANT: May I know your dates of journey please?

USER: I want to fly on Dec 12 and return on Dec 14.

ASSISTANT: May I know your good name please?

USER: Myself Donna Roberts.

ASSISTANT: Do you have any specifications please?

USER: I need a single connection.

ASSISTANT: Please wait for a mean while.

USER: Ok.

ASSISTANT: Sorry Roberts, there is no flight found as per your travelling details.

USER: Not an issue. Thank you.

ASSISTANT: You are welcome.