You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: I am Sharon Williams. I want to change my reservation, can you help in that?

ASSISTANT: Sure, can you spare a minute, so that I can check in reservation status?

USER: Ok.

ASSISTANT: I have checked in reservation list to change, but could not find any reservation with your name.

USER: That's ok.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.