You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello,.

USER: I am Donna Wilson.

ASSISTANT: How may I support you?

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

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name.

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

ASSISTANT: Thanks for connecting us.