You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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: Sure, can I have your name please?

USER: My name is Larry Harris.

ASSISTANT: There is no reservation found with your name.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Have a nice day.