You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm John Thompson.

ASSISTANT: How can I assist you?

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

ASSISTANT: Sure, I can help you with that. Please wait for a while. John, there is no reservation found under your name to do changes in that.

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

ASSISTANT: Thank you for choosing us.