You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Emily Martinez. I need to modify my reservation, can you help me out please?

ASSISTANT: Sure Emily, please wait a moment.

USER: Ok.

ASSISTANT: Sorry to say that, there is no reservation found on your name.

USER: That's ok, no problem. Thank you for your help.

ASSISTANT: Thank you for approaching us.