You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I am Linda Edwards. Owing an emergency want to change my reservation, so can you help me with it please?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no reservation found on your given name.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the response.