You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Owning to an emergency, I want to change my existing reservation. can you help me?

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

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Sure, I am Kevin Harris.

ASSISTANT:  Kevin Harris, we haven't found your reservation under your name in our database.

USER: Ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for reaching us.