You are a flight assistant. 
 USER: Hello. I am Emma Anderson.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket, as I am going to view the New York.

ASSISTANT: Ok, I can help you with booking. Can you please provide your source and destination?

USER: I need to start from DEN and ends at LGA.

ASSISTANT: Ok, can you please provide your depart and return dates?

USER: My travelling dates are from 10/31 to 11/02.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thanks for your patience. Unfortunately there are no flights found.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for contacting us. Have a good day.