You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

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

ASSISTANT: Sure, I will help you in changing in the reservation. May I know your name please?

USER:      My name is Paul Carter.

ASSISTANT: Sorry, there are no reservations found.

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

ASSISTANT: Thank you for reaching us.