You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Good afternoon, how can I help you?

USER: I wish to see Penguins, I would like to visit Central Park Zoo with my friend. Could you please help me in booking a ticket?

ASSISTANT: Sure, may I know your details for booking a ticket.

USER: Ok, I would like to move from DEN on 04/04.

ASSISTANT: May I know your your arrival date & code  please?

USER: Sure, my destination airport code is LGA and my return date is on 04/06.

ASSISTANT: May I know your name please?

USER: Sure, my name is Kathleen Miller.

ASSISTANT: I am sorry, there is no flight on your dates.

USER: Ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your response.