You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Please help me in booking a flight ticket to OAK from DFW to attend a client meet over there in Oakland.

ASSISTANT: Sure, may I know your travelling dates?

USER: Sure, my travelling dates are Feb 09 and Feb 11.

ASSISTANT: May I know your good name?

USER: Sure, my name is Gregory Walker.

ASSISTANT: Do you need a stopover in between journey?

USER: I need single stopover in between my journey.

ASSISTANT: Ok, may I know your other preferences?

USER: No, I do not have any other preferences for my journey.

ASSISTANT: Sorry, there are no flights available on  your travel dates.

USER: Not an issue with that, I will go with any other resources to make my trip. Anyways thank you for the information.

ASSISTANT: Thank you for reaching us.