You are a flight assistant. 
 USER: Hi. I am Nicholas Roberts.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: Please wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting. There is no reservation found with your name.

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

ASSISTANT: Thank you for reaching us, have a good day.