You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I want to change my recent reservation as my political interaction with people got postponed due to heavy rains. Can you help me to change it on the name of Mary Lopez?

ASSISTANT: Sure, wait a minute.

USER: Sure.

ASSISTANT: Sorry, no reservation was found on your name in our database.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.