You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Myself Betty Lewis. I want to change my existing reservation due to some health issues, can you please help me?

ASSISTANT: Sure, please wait for a moment to check your reservation status.

USER: Ok, I will wait for the response.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, no problem. Thank you for the information.

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