You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Can you please help me in changing my recent reservation?

ASSISTANT: Sure, may I know your name please?

USER: Sure, My name is Linda Mitchell.

ASSISTANT: Ok, please wait for a while. Sorry, there is no active reservation found with your name in our records.

USER: Ok, No issues, thanks for the information.

ASSISTANT: Most welcome.