You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I want to amend an existing reservation due to health issue, can you please help me?

ASSISTANT: Sure, can you please let me know your name to proceed further?

USER: Sure, my name is Sharon Jones here.

ASSISTANT: Please wait a moment while I check with the status.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation found under your name to change.

USER: Ok, not an issue.Thank you for your information.

ASSISTANT: Thank you for reaching us.