You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emma Moore.

ASSISTANT: How may I assist you?

USER: I need to amend my reservation, can you help me out?

ASSISTANT: Sure, I am here to help you out.

USER: Thank you.

ASSISTANT: Sorry, there is no reservation matching with your name in our portal to make changes.

USER: That's ok, not an issue. I will check with my mail about this concern. Thank you for your information.

ASSISTANT: Thank you for reaching us.