You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way can our agency benefit you?

USER: My mother want to visit Millennium Park which is in Chicago, can you succour me with it in booking the flight ticket?

ASSISTANT: Certainly, I will book a flight ticket for your mother.

USER: Thank you.

ASSISTANT: There are some information I need to know to proceed, can you help me by providing me your airport codes?

USER: Sure, my boarding airport code is SFO and deboarding airport code is ORD.

ASSISTANT: Ok, may I know your inclination dates of journey?

USER: I would like to airborne on 09/23 till 09/25.

ASSISTANT: Please wait a moment while I search for the flight availability.

USER: Ok.

ASSISTANT: May I know your mother's name to confirm the booking?

USER: My mother name is Sarah Perez.

ASSISTANT: I regret to inform that there are no flight available at those dates.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for availing our service.