You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Raymond Lee. Please book a flight ticket on dates 01/21 and 01/23.

ASSISTANT: Sure, I am here to help you. Can you please share your airport codes?

USER: My airport codes are CLT and MCO.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know your departure and arrival time?

USER: I want to return at afternoon.

ASSISTANT: May I know your airline preference?

USER: I don't have airline preference.

ASSISTANT: Which class do you prefer?

USER: I am ok with any class.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry, there is no flight in this route as per your travelling details.

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

ASSISTANT: Thank you for choosing us.