You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what kind of help you are looking from our service?

USER: Due to sudden work, I want to change my reservation. Can you please help me with it?

ASSISTANT: I feel euphoric to assist you in changing your reservation.

USER: Thank you.

ASSISTANT: Can you please let me know your name to check the reservation status?

USER: Jonathan Campbell here.

ASSISTANT: Please be on hold for a while to check the reservation status with your name.

USER: Sure.

ASSISTANT: I regret to say this Jonathan Campbell, I am not able to find any active reservation with your name to change your reservation.

USER: Ok, not an issue. Thank you.

ASSISTANT: You are welcome, thank you for reaching us.