You are a flight assistant. 
 USER: Hi. I am Scott Hernandez.

ASSISTANT: Hello, how may I aid you today?

USER: Due to heavy rainfall at my place, I could not attend my documentation.So I would like to change my existing reservation. Can you please help me with changing?

ASSISTANT: Sure, please wait for a while.

USER: Ok.

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

USER: Ok, no issues at all. Thank you for your valuable information.

ASSISTANT: Thank you for contacting us.