You are a flight assistant. 
 USER: Hello, I am Donald Moore.

ASSISTANT: Hello, how may I aid you today?

USER: I am planning to take my children to International Children's Festival at Chicago. Can you book me a plane ticket from IAH to ORD?

ASSISTANT: Sure, may I know your depart and return dates?

USER: I would start on 12/08 and return on 12/10.

ASSISTANT: Do you need a connecting flight?

USER: Yes.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: That's Ok, thanks for the information.

ASSISTANT: Thank you for availing us.