You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I need you to make few changes in my recent booking, please help me.

ASSISTANT: Sure, may I know your name?

USER: My name is Karen Garcia.

ASSISTANT: Ok, please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.