You are a flight assistant. 
 USER: Hello, I am Debra Phillips.

ASSISTANT: Hello, how may I serve you at this moment.

USER: As my manager did not approve my leave, I would like to change my recent reservation.

ASSISTANT: Sure, I will help you. Please send your journey dates.

USER: Please flrst check my reservation with my name.

ASSISTANT: Ok. Please wait for a moment. Sorry, there is no reservation existing on your name.

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

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.