You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Kenneth Lee.

ASSISTANT: How may I assist you today?

USER: I would like to change my reservation which is under my name. Can you please help me with that?

ASSISTANT: Sure, I am here to help you to change the reservation, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: Thanks for your waiting, I could not find any reservation with your name.

USER: Ok, no issues. Thank you for checking.

ASSISTANT: Welcome.