You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Myself Kimberly Collins. Can you please help me in booking a flight ticket from DCA to  DFW locations?

ASSISTANT: Sure. Please send your travelling dates.

USER: My travelling dates are from 08/23 and 08/25.

ASSISTANT: Sorry, there is no flights available on your route.

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

ASSISTANT: Thank you for reaching us.