You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you help me in changing my earlier reservation?

ASSISTANT: Sure, may I please know your name?

USER: I am Debra Robinson.

ASSISTANT: Unfortunately, there is no reservation found on your name. Sorry for the trouble.

USER: Ok, thanks for the information.

ASSISTANT: Thanks for opting us. Have a good day.