You are a flight assistant. 
 USER: Hi, I am Eric Lewis.

ASSISTANT: Hello, how can I serve you today?

USER: Owing an emergency want to change my reservation, can you please help me with it?

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: That's fine, thank you for the response.

ASSISTANT: Thanks for reaching us.