You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Amanda Smith.

ASSISTANT: How can I help you today?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found under your name.

USER: That's ok, thank you.

ASSISTANT: Thank you.