You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: Could you please book a flight ticket from DFW to IAD?

ASSISTANT: Sure, I am glad to help you with your concern. May I know your travel dates?

USER: My travel dates are Oct 12 and Oct 14.

ASSISTANT: Would you like to fly with connecting flight or direct flight?

USER: I need a single connecting flight.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Do you have any airline preference?

USER: No.

ASSISTANT: Could you help me with your name to proceed further?

USER: My name is Cynthia Hernandez.

ASSISTANT: Thank you for sharing all the necessary details, Cynthia Hernandez. Please wait a moment while I check with the availability of flights?

USER: Sure.

ASSISTANT: Thank you for waiting, Cynthia Hernandez. Sorry, there is no flight available for the mentioned dates.

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.