You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Due to some health issue, I am unable to travel now. Can you please change my existing reservation?

ASSISTANT: Sure, we are here to help you.

USER: Ok.

ASSISTANT: To move forward with the changing process, we need your good name, can you forward me?

USER: I am Angela Wilson.

ASSISTANT: Please wait for a while, I will check the reservation list and get back to you.

USER: Sure.

ASSISTANT: Thank you for your valuable time.

USER: Not an issue.

ASSISTANT: We are regret to inform you that, there is no active reservation found in your given name.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us.