You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my existing reservation due to heavy rains. Can you help me for this one?

ASSISTANT: Sure, may I know your name?

USER: Alexander Nelson here.

ASSISTANT: Please wait, I will check the reservation on your name and get back to you.

USER: Sure.

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

USER: No issues, thank you for the information.

ASSISTANT: Thank you for reaching us.