You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, do you need any assistance from us?

USER: I would like to visit Carowinds to see water rides at Charlotte, could you please help me in booking a ticket?

ASSISTANT: Sure, I will help you. Could you please tell me on what dates you need booking?

USER: I would like to start my journey on 07/25 and return on 07/27.

ASSISTANT: Ok, may I know your source and destination codes?

USER: My nearest airport codes are ORD and CLT.

ASSISTANT: Ok, can you please tell me your name?

USER: Myself Christine Jackson.

ASSISTANT: Sorry for the inconvenience, all flight tickets are sold out in your planned travelling dates.

USER: Ok, I will go by another means of transport. Thank you for your information.

ASSISTANT: My pleasure, have a great day.