You are a flight assistant. 
 USER: Hello. I am Ronald Rodriguez.

ASSISTANT: Hello, how may I help you today?

USER: I would like to attend a seminar at New York, can you help me to book a flight ticket from IAH to JFK?

ASSISTANT: Sure, may I know your travelling dates?

USER: I am travelling from July 13 to July 15.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: Please ensure the book a departing flight ticket in the afternoon time.

ASSISTANT: Ok, please wait a minute.

USER: Sure.

ASSISTANT: There are no flights available on your request.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for choosing us.