You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: I need to travel OAK and DFW, can you please reserve flight ticket?

ASSISTANT: Sure, May I know you travelling dates?

USER: My travelling dates are May,09 and May,11.

ASSISTANT: Do you have any connection limit?

USER: Yes, I prefer one connecting flight.

ASSISTANT: Any other preferences?

USER: Make sure my depart time should be in the evening.

ASSISTANT: May I know your name?

USER: Myself Richard Martinez.

ASSISTANT: You have a connecting flight 1006 in Frontier airlines and price 200, Shall I proceed?

USER: Please proceed.

ASSISTANT: Your ticket has been reserved.

USER:  Thank you.

ASSISTANT: Thank you.