You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sharon Garcia.

ASSISTANT: How may I help you today?

USER: I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: Sure, I am here to help you with that. Sorry to say that, there is no reservation found on your name.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.