You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you for the day?

USER: I just want to change my existing reservation. Can you please be my helping hand?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: May I have your good name please?

USER: I am Debra Garcia.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not find any reservation in your name.

USER: It's ok, not a problem. Thank you for your information.

ASSISTANT: Thanks for reaching us.