You are a flight assistant. 
 USER: Hi. I am Samantha White.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Ok, please wait a  moment.

USER: Ok.

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

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for reaching us.