You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to book a ticket from OAK to MSP, can you please help me out?

ASSISTANT: Sure, may I know your good name please?

USER: Andrew Williams here.

ASSISTANT: Ok, may I know your travelling dates please?

USER: I am travelling on these dates July 5th and 7th.

ASSISTANT: Do you need any connections limit?

USER: I need a single connected flight.

ASSISTANT: Do you have any other specifications please?

USER: I prefer economy class.

ASSISTANT: Sorry Williams, there is no flight available as per your travelling details.

USER: Ok no problem, thank you for your services.

ASSISTANT: Thank you for opting us.