You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Can you help me to book a flight ticket from ORD to DEN?

ASSISTANT: Sure, when do you want to start and return on?

USER: I want to take off on 19 Oct and return on 21 Oct.

ASSISTANT: Do you need a connecting flight?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Thank you for your details, there are no flights found with the given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Can I know your good name?

USER: I am Dorothy Edwards.

ASSISTANT: Thank you.