You are a flight assistant. 
 USER: Hello, I'm Rachel Young.

ASSISTANT: Hello. How can I help you?

USER: Due to the bad climatic conditions in the place where I want to go, so I would like to change my existing reservation. Could you help me out?

ASSISTANT: Sure, please wait for a moment.

USER: Ok.

ASSISTANT: There is no previous reservation with your details.

USER: That's ok, thank you.

ASSISTANT: Thank you for approaching us.