You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am looking to book a flight ticket to meet my friend in Orlando. Can you help me for booking a flight ticket from ORD to MCO?

ASSISTANT: Sure, may I know when are you travel?

USER: My travelling dates are Dec 16 and Dec 18.

ASSISTANT: May I know your connection limit?

USER: I prefer to book a single connecting flight.

ASSISTANT: Do you have any specific class preference for this journey?

USER: No.

ASSISTANT: What times of depart and return are you looking for?

USER: My depart time is evening.

ASSISTANT: Sure, is there any particular airline are you looking for?

USER: No.

ASSISTANT: Thank you for sharing all the details, please stay connected for a while.

USER: Ok.

ASSISTANT: May I know your name to proceed further?

USER: My name is Sharon Thomas.

ASSISTANT: We are sorry to inform you that we don't have any flight available which departs in the evening form Chicago.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.