You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

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

ASSISTANT: Sure, may I know your name to check the reservation?

USER: My name is Paul Williams.

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

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

ASSISTANT: Thank you for reaching us.