You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Elizabeth Anderson. I want to book a connecting flight to New York NY-LGA to participate in swimming competition.

ASSISTANT: Ok.

USER: Can you please help me in booking my flight ticket from Denver CO-DEN.

ASSISTANT: Sure. May I know your travelling dates?

USER: Thank you. I want to start on 02/25, my recur date is on 02/27.

ASSISTANT: Thanks for your details. There are no flights found on your data.

USER: No problem, thank you for your information.

ASSISTANT: Thank you.