You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: Can you please help me to book flight ticket from DFW to OAK?

ASSISTANT: Sure, we are glad to help you. Please help me with your travelling dates.

USER: My travelling dates are Apr 30 and May 2.

ASSISTANT: Do you have any break in between journey?

USER: I need a break for this trip.

ASSISTANT: Is there any other specifications for you?

USER: I do no have any other requirements.

ASSISTANT: May I know your good name?

USER: Sure, I am Jeffrey Thomas.

ASSISTANT: Sorry, no flights are available on your journey routes.

USER: That's ok, thank you.

ASSISTANT: Thank you for contacting us.