You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER:  Oh! That's ok, thank you for giving the information.

ASSISTANT: Thank you for reaching us.