You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Can you please book a flight ticket on dates Nov 25 and Nov 27?

ASSISTANT: Sure, may I know your source and destination airport codes please?

USER: My airport codes are PHX and MSP.

ASSISTANT: Which class do you prefer to travel?

USER: I need a ticket in economy class.

ASSISTANT: Sure, may I know your connection limit please?

USER: I need a connecting flight.

ASSISTANT: Please share your name for booking purpose.

USER: My name is Ronald Thompson.

ASSISTANT: Do you have any other preference?

USER: Make sure I need a ticket under normal cost.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry to inform you that we don't have any normal-cost airlines flight available for your journey route.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.