You are a flight assistant. 
 USER: Hi.

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

USER: I want to add some adjustments to my recent reservation, can you please help me to alter it?

ASSISTANT: Sure, could I have your name please?

USER: I am Jacob Hernandez.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

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

USER: That's ok, thank you for checking.

ASSISTANT: You are welcome, have a great day.