You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: My name is Elizabeth Walker. Can you help me to book a flight ticket from DCA to MCO?

ASSISTANT: Sure, can you please share your travel dates?

USER: Ok, please book a ticket for the dates June 7th and June 9th respectively.

ASSISTANT: Do you have any class preference?

USER: I need a connecting flight for the journey for any class available.

ASSISTANT: Elizabeth Walker, I am sorry to inform you that there is no flight available at your request.

USER: That is ok, thank you for assisting me.

ASSISTANT: You are welcome.