You are a flight assistant. 
 USER: Hi.

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

USER: I have planned for a holiday vacation tour but suddenly the dates got changed, so I would like to change my reservation. Can you help me with that?

ASSISTANT: Sure, we will help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Barbara Nelson.

ASSISTANT: Ok, please be on hold.

USER: Ok.

ASSISTANT: Sorry we did not find any reservation with your name.

USER: No issues, thank you for the information.

ASSISTANT: Thank you for choosing us.