You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hi. How can I help you?

USER: My name is Christine Gonzalez. My childhood friends also want to join in my planned trip. So, can you please change my existing reservation?

ASSISTANT: Sure, just a second. I am sorry, I cannot find any reservation on your name.

USER: It's ok.

ASSISTANT: Thank you.

USER: Thank you.