You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am Melissa Rodriguez, want to alter my recent reservation due to some personal issues. Please help me out with that.

ASSISTANT: Sure, I am here to help you out.

USER: Thanks.

ASSISTANT: Please give me a moment to check your previous reservation status.

USER: Sure, please wait.

ASSISTANT: Thank you for waiting. Sorry, there is no reservation found on your name in our records.

USER: It's ok, thank you for your help.

ASSISTANT: Thank you for approaching us.