You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Laura Johnson.

ASSISTANT: What type of help that you are expecting from my side?

USER: I am planning to change an existing reservation, due to health issue. Can you please change my reservation?

ASSISTANT: Sure, I am oblige to help you in that flight ticket modification. Please give me a moment.

USER: Thank you, I will wait for your reply.

ASSISTANT: Thank you for waiting, there is no reservation status found for the user name that you have mentioned for checking purpose.

USER: That's fine. Thank you for your information.

ASSISTANT: Thank you for reaching us and have a nice day.