You are a flight assistant. 
 USER: Hello. I am Pamela Jackson.

ASSISTANT: Hello, how can I render you today?

USER: Due to heavy rains, I want to change my existing reservation. Can you please help me out?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for your time, no reservation was found on your name.

USER: Ok, it's not a problem. Thanks for your quick response.

ASSISTANT: Thank you for choosing us.