You are a flight assistant. 
 USER: Hello, I am Robert Moore.

ASSISTANT: Hello, how can I help you today?

USER: I need to fly Austin, could you please help me in booking my flight ticket from DFW to AUS?

ASSISTANT: Sure, I am here to help you. When did you planned to travel?

USER: My journey is from 02/21 to 02/23.

ASSISTANT: Do you have any specification?

USER: I need a connecting light.

ASSISTANT: OK, please wait I will check the best flight for you.

USER: Ok.

ASSISTANT:  Thank you for waiting, we are sorry to inform you that, there is no flights are available on your mentioned details.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for choosing us, have a good day.