You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,. How can I abet you?

USER: Owing an emergence, I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, I am mirthful to assist you. May I know your good name please?

USER: My name is Janet Hernandez.

ASSISTANT: Ok, wait for a minute. I will check in the reservation list and let you know the status.

USER: Ok.

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

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for approaching us, we hope to serve you again.