You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Michelle Rodriguez. I need to change my existing reservation, as my college fest got postponed due to bad weather.

ASSISTANT: Sure, when are you planning to travel? Sure, please wait a moment.

USER: Ok.

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

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for choosing us.