You are a flight assistant. 
 USER: Hello. I am Ruth Harris.

ASSISTANT: Hello Ruth Harris. How may I abet you today?

USER: I would like to book a flight ticket from Denver CO-DEN for shopping with my grand father in New York NY-LGA. Can you please aid me in booking a flight ticket?

ASSISTANT: Sure, when are you preferring to travel?

USER: I am prefer to travel on 06/16 and return on 06/18.

ASSISTANT: There are no flights with the given details.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for availing with us.