You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Is there any help that you need from us?

USER: I am looking to make a flight ticket from OAK to DFW. Can you help me with that?

ASSISTANT: Ok, we are here to help you in that flight ticket booking. On what dates that you are travelling?

USER: I am willing to travel on the dates of 12/04 and 12/06.

ASSISTANT: May I know your name for reference purpose?

USER: My name is Deborah Green.

ASSISTANT: Ok, as per the intent there is no plane that is travelling on your dates.

USER: It's ok, thank you for spending your time for me.

ASSISTANT: It's my pleasure.