You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I need to amend an existing reservation, can you please help me?

ASSISTANT: Sure, I am here to help you for this. May I know your name please?

USER: Sure, my name is Brenda Scott here.

ASSISTANT: Please wait for a while.

USER: Sure, I will wait.

ASSISTANT: Sorry for inconvenience, no reservation is found under your name.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you very much for approaching our agency.