You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How best can I help you today?

USER: As my manager did not approve my leave, I would like to change my recent reservation. Can you aid me with this?

ASSISTANT: Sure, I am happy to help you in changing your reservation.

USER: Thank you.

ASSISTANT: For changing the existing reservation, we need to know your name to check your reservation status. So, can you please forward me your name?

USER: Myself Alexander Hall.

ASSISTANT: Ok, please wait for a moment. I will check with it and get back to you soon.

USER: Sure, take your time.

ASSISTANT: Sorry for the inconvenience, there is no reservation found on your name in our records.

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

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