You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Will you please help me to change my reservation as the business meeting with my Client got postponed?

ASSISTANT: Sure, I can help you in that. May I know your good name please?

USER: Sure, my name is Nancy Lopez.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Nancy Lopez, there is no active reservation found under your name to do changes in that.

USER: Not a problem, thank you.

ASSISTANT: Thank you for reaching us.