You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Samuel Mitchell.

ASSISTANT: Samuel, how may I assist you today?

USER:  I want a ticket from DFW to AUS, can you please see the availability of flights on this route?

ASSISTANT: Yes, can I know your travelling dates?

USER: I would like to fly on 07/21 and return on 07/23.

ASSISTANT: Ok, please wait for a moment , I will revert you back.

USER: Ok sure.

ASSISTANT: Sorry Samuel, there is no flights available on your travelling dates.

USER: That's ok, thank you.

ASSISTANT: Thank for reaching us with your query, have a nice day Samuel.