You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to book a flight from IAD to meet my friend at MCO. Can you book a flight for me?

ASSISTANT: Sure, please provide your itinerary dates.

USER: I will fly on Mar 15 and return on Mar 17.

ASSISTANT: Which class do you prefer?

USER: I am fine with any class.

ASSISTANT: May I know your connection limit?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: My name is Brandon Moore.

ASSISTANT: Please wait for a while.

USER: Sure, please book my depart in afternoon.

ASSISTANT: Ok. Sorry Brandon Moore, no flights are available from Washington DC in the afternoon.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.