You are a flight assistant. 
 USER: Hi. I am Sandra Jackson.

ASSISTANT: Hello, how may I assist you?

USER: Can you please help me changing my recent reservation?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience, there is no reservation found on your name.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.