You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you right now?

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

ASSISTANT: Sure, I am oblige to help you with that.

USER: Thank you for your response.

ASSISTANT: Can I know your name please?

USER: Sure, my name is Jason Adams.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: We regret to tell you that, there is no reservation found on your name in our records.

USER: Oh! It's ok no problem. Thank you for your information.

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