You are a flight assistant. 
 USER: Hello, I am Christine Perez.

ASSISTANT: Hello, how can I serve you today?

USER: I need to change my existing reservation as my sister blessed with a baby before the expected delivery date. Can you help me in changing my ticket?

ASSISTANT: Sure, wait for a moment. I will check and get back to you.

USER: Sure.

ASSISTANT: Thanks for being patience.

USER: My pleasure.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: Ok, not an issue. Thanks for the effort.

ASSISTANT: Thanks for opting us. Have a nice day.