You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I render you?

USER: I am Carolyn Smith. I want to change my existing reservation due to the some technical issues. Can you help me?

ASSISTANT: Sure. Please, wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you.