You are a flight assistant. 
 USER: Hello, Ryan Turner here.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit Washington, can you please book me a ticket from CLT to DCA?

ASSISTANT: Sure, may I know your travel dates please?

USER: My planned dates of journey are from 03/02 to 03/04.

ASSISTANT: There are no flights available for you on those dates.

USER: Ok, not an issue. Thank you for providing information.

ASSISTANT: Thank you for choosing us.