You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in booking a flight ticket from DEN to LGA?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to travel on 08/13, and return on 08/15.

ASSISTANT: Do you prefer a connecting flight?

USER: I need a connecting flight.

ASSISTANT: May I know your other specifications?

USER: I am comfortable with above requirements.

ASSISTANT: May I know your name?

USER: I am Angela Green.

ASSISTANT: Sorry, currently there are no flights available on your request.

USER: Ok, no issues. Thanks for the information.

ASSISTANT: Thank you for choosing us.