You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Donna Anderson.

ASSISTANT: Ok.

USER: I want to book a flight ticket to meet my parents in Oakland CA - OAK, so please help me in booking a flight ticket from TX - DFW.

ASSISTANT: Sure, when your are willing to travel?

USER: I want to fly on 12/02 and return on 12/04.

ASSISTANT: Do you need a direct or connecting flight?

USER: I need a direct flight.

ASSISTANT: Sorry, no flights found on your requested dates.

USER: Not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you.