You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Can you please help me to change my reservation?

ASSISTANT: Sure, may I know your good name?

USER: My name is Christine Lewis.

ASSISTANT: Ok, please wait for a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no active reservation found on your name.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.