You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Myself Samuel Evans. With my friend suggestion I want to travel from DCA to CLT locations, Can you please reserve a flight ticket for my trip?

ASSISTANT: Sure, may I know your planned dates to travel?

USER: Please book the ticket on 06/16 date and the return ticket on 06/18 date.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry for the inconvenience, there is no flight available on your requested dates.

USER: It's ok. Thank you for the infromation.

ASSISTANT: Thank for reaching us.