You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Helen Roberts.

ASSISTANT: How can I help you?

USER: I am planning to visit Oakland, can you please book me a ticket from DFW to OAK?

ASSISTANT: Let me know your travelling dates.

USER: I am planning to depart on Mar 25 and would like to return on Mar 27.

ASSISTANT: Do you have any preference?

USER: I prefer connecting flight on this route.

ASSISTANT: Found ticket with airline Spirit for price 100 having flight number 1010.

USER: Please reserve my ticket in this flight.

ASSISTANT: Your ticket is booked.

USER: Thank you for your service.

ASSISTANT: Thanks.