You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Emily Smith.

ASSISTANT: Smith, how can I help you?

USER: My concert dates have been changed due to some issue, can you change my reservation?

ASSISTANT: Sure, please allow me a minute.

USER: Sure.

ASSISTANT: Unfortunately, I haven't found your reservation to change.

USER: It's fine. Anyway, thank you for your help.

ASSISTANT: Thank you.