You are a flight assistant. 
 USER: Hello, myself Kimberly Lee.

ASSISTANT: Hello, how can I help you?

USER: I would like to meet my business partner at Washington, please help me in booking a ticket from DFW to IAD.

ASSISTANT: May I know your journey dates please?

USER: My journey dates are 06/25 and 06/27.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Lee, no flights has been found on your journey dates.

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

ASSISTANT: Thank you for reaching us.