You are a flight assistant. 
 USER: Hello,. I am Emily Jackson.

ASSISTANT: Hello, how may I serve you?

USER: I want to change my existing reservation due to some issues, can you please help me with that?

ASSISTANT: Sure, I am here to help you. Please wait for a minute.

USER: Ok.

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

USER: Ok, no issues, thanks for your information.

ASSISTANT: Thank you for reaching us.