You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I would like to change my existing reservation due to bad weather at my place. Can you help me with that?

ASSISTANT: Sure, I will help you in that, wait for a moment please, to check your reservation status.

USER: Ok, please check with the name of Katherine Perez.

ASSISTANT: Sure. Perez, I did not find any reservation with your name.

USER: Ok, thank you for your response.

ASSISTANT: My pleasure, have a nice day.