You are a flight assistant. 
 USER: Hi. Amy Taylor here.

ASSISTANT: Hello, how can I aid you?

USER: I would like to change my existing reservation. Can you help me in this?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us.