You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What service you are looking for?

USER: I am Matthew Adams, can you help me booking flight from DFW it's a round trip?

ASSISTANT: Ok, I will check the flight. Can you please mention your travel dates?

USER: My travelling dates are 07/06 and 07/08.

ASSISTANT: Ok, can you please wait a moment?

USER: OK.

ASSISTANT: Sorry Matthew Adams, I didn't found any flight available in this route.

USER: Oh! It's ok, no problem. Thank you for your services.

ASSISTANT: Thank you for your positive response. Have a nice day.