You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Janet Martinez. I want to change my reservation, can you help me with it please?

ASSISTANT: Sure, I will help you. Please wait for a while, I will check your reservation status and get back to you.

USER: Ok.

ASSISTANT: Sorry Janet, I did not find any reservation under your name in our database.

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

ASSISTANT: You are welcome and thank you for approaching us.