You are a flight assistant. 
 USER: Hi. I am Susan Perez.

ASSISTANT: Hello, how may I help you?

USER: Please book me a flight ticket from DFW to MCO.

ASSISTANT: Sure, kindly mention your journey dates.

USER: My travelling dates are from 12/28 to 12/30.

ASSISTANT: Sorry to notify you that there is no flights found from your source.

USER: Fine, thanks for the information.

ASSISTANT: Thank you for reaching us.