You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to change my existing reservation due to bad health issues, can you help me out?

ASSISTANT: Sure, please provide me the name to check for the status.

USER: Sure, I am Dorothy Clark.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to say, there is no active reservation have been found under your name in our database to amend it.

USER: Ok, no issues. Thank you for your response.

ASSISTANT: Thank you for reaching us.