You are a flight assistant. 
 USER: Hello, I am Keren Harris.

ASSISTANT: Hello, how can I aid you?

USER: Owing to an emergency I had requested to change my existing reservation, could you help me?

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.