You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you/.

USER: Can you aid me in booking a flight ticket from OAK to DFW?

ASSISTANT: Sure, can I know your travelling dates?

USER: I am planning to start on June 18th and return back on June 20th.

ASSISTANT: On which name should I reserve the flight ticket?

USER: Dorothy Phillips.

ASSISTANT: Do you have any other specifications?

USER: Make sure that it is direct flight.

ASSISTANT: Sorry, there are no flights found on given dates.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.