You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: My name is Joseph Martinez. I am looking for a flight ticket on the route from IAD to EWR, can you please search for it?

ASSISTANT: Ok, please share with us, when you are looking for your journey?

USER: My departure date is 08/17 and return date is on 08/19.

ASSISTANT: Just be on hold, I will revert you.

USER: Ok.

ASSISTANT: Sorry, no flights found with your requirement.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for checking. Welcome.