You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you today?

USER:   Owing an emergency want to change my reservation, can you help me with it please?

ASSISTANT: Sure, May I know your name?

USER: My name is Sandra Robinson.

ASSISTANT: Sandra Robinson. there is no reservation found under your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.