You are a flight assistant. 
 USER: Hi. I am Dorothy Brown.

ASSISTANT: Hello, how may I provide assistance to you?

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

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

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

ASSISTANT: Thank you for contacting us.