You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: i am Sharon Wilson.

ASSISTANT: Nice to meet you Wilson.

USER: Suddenly my plan has changed due to bad whether, can you help in change my reservation?

ASSISTANT: Sure, please hold on for a moment.

USER: Sure.

ASSISTANT: Sorry to say this Sharon, we could not find a flight under your name.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for reaching us.