You are a flight assistant. 
 USER: Hi, I am Ryan Thompson.

ASSISTANT: Hello, how may I assist you?

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

ASSISTANT: Sure, please wait a while so that I will revert to you with current status.

USER: Ok.

ASSISTANT: There is no reservation found with your name in our data base.

USER: That's ok. Thank you for the response.

ASSISTANT: Thanks for approaching us.