You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I want to change my existing reservation, due to bad weather conditions. Can you please help me to change my existing reservation?

ASSISTANT: Sure, can you give me your name?

USER: Thank you, I am Betty Young here.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for reaching us.