You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I want to change my existing reservation due to heavy rain fall, can you please help me with this?

ASSISTANT: Ok, can you please share your name to check with your reservation status?

USER: My name is Jessica Davis.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to say, there is no reservation by your name.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for choosing us.