You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I would like to change my existing reservation due to some health problems, can you please help me in this intent?

ASSISTANT: Sure, may I know your name please to check the status?

USER: Ok, my name is Pamela Edwards.

ASSISTANT: Pamela, there is no reservation found with your details.

USER: That's fine. Anyways, thank you for your information.

ASSISTANT: Thank you for reaching us.