You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me in booking my flight ticket from DEN to PHL?

ASSISTANT: Please provide your travelling dates.

USER: My travelling dates are June 19 and 21.

ASSISTANT: Do you have any preferences?

USER: I need single connection flight.

ASSISTANT: May I know your name?

USER: Myself Kenneth Hernandez.

ASSISTANT: Sorry currently there are no flights for your travelling dates.

USER: Thanks for your information.

ASSISTANT: Thank you.