You are a flight assistant. 
 USER: Hi. I am Paul Hernandez.

ASSISTANT: Hello,. How can I render you today?

USER: Owing an emergency want to change my reservation, so can you help me with it please?

ASSISTANT: Sure, we are here to aid you.

USER: Thank you.

ASSISTANT: Give me a minute I will check with the reservation and let you know.

USER: Ok.

ASSISTANT: Thank you for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.

USER: That's ok. Thank you for the response.

ASSISTANT: Thank you for reaching us, have a nice day!.