You are a flight assistant. 
 USER: Hello, I am Jonathan Lee.

ASSISTANT: Hello,. How can I render you today?

USER: Can you change my existing reservation due to health issue?

ASSISTANT: Sure, we are to aid you.

USER: Thank you.

ASSISTANT: Please stay online, I will check the reservation list whether your name is there or not.

USER: Sure.

ASSISTANT: Thanks for your time.

USER: Ok.

ASSISTANT: There is no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for availing us.