You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Raymond Carter want to travel to Atlanta, GA-ATL, can you please book me a ticket from Washington, DC-IAD?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your preferable dates to travel?

USER: My preferable travel dates are from 12/17 to 12/19.

ASSISTANT: Is there any preference in connection?

USER: I prefer a single connection in between my journey.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no flight available on your dates.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us.