You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Barbara Williams, can you please aid me in booking my flight ticket to SFO from LAX?

ASSISTANT: Sure, on what dates are you planning to travel?

USER: Sure, my planned travel dates are from Dec 1st  till Dec 3rd.

ASSISTANT: Do you need a lay by?

USER: Yes.

ASSISTANT: Is there any class preference?

USER: No, I do not have such type of preference.

ASSISTANT: Thanks for sharing your essentials. Currently there are no flights going on your route.

USER: Not a problem, anyways thank you for the information.

ASSISTANT: Thank you for opting us.