You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I need to change my reservation, due to sudden change in my trip. Can you please aid me?

ASSISTANT: Sure, may I know your name please?

USER: Nancy Roberts.

ASSISTANT: Wait a while , Kindly.

USER: Sure.

ASSISTANT: Thank you for waiting, we do not found any reservation in your name to make changes further.

USER: Not an issue, thank you for helping me.

ASSISTANT: Thank you for reaching us.