You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you please help me with changing my recent reservation?

ASSISTANT: Sure, can you please let me know your name?

USER: My name is Elizabeth Phillips.

ASSISTANT: Please wait a moment, while I check.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry, there is no active reservation found under your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.