You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: I will help you with that. Can I know your name please?

USER: My name is Nicholas Nelson.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for connecting with us.