You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Please help me in booking flight ticket from OAK to DFW.

ASSISTANT: Can I know your travelling dates?

USER: My trip dates are Oct 20 to Oct 22.

ASSISTANT: Do you have any connection preference?

USER: I need a connecting flight.

ASSISTANT: Is there any specifications?

USER: No.

ASSISTANT: Please let me know your name?

USER: Robert Green.

ASSISTANT: Found ticket with Spirit airlines for price 100 having flight number 1019. Shall I book a ticket?

USER: You can book.

ASSISTANT:  Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you.