You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, do you need any help from us?

USER: I am Alexander Perez. I would like to change my existing reservation, due to continues rainfall my baseball game has been postponed. Can you please assist me?

ASSISTANT: Sure, please allow me a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation with your name in our portal to make changes.

USER: Ok, no issues. Thank you.

ASSISTANT: You are welcome, have a great day.