You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Thomas Moore.

ASSISTANT: How can I assist you  at this moment?

USER: Due to some business meeting, I am going to change my reservation. Can you please help me in changing the reservation?

ASSISTANT: Sure Thomas Moore, I will help you with that.

USER: Sure, I will wait for your response.

ASSISTANT: Please wait a moment to check your reservation status. Sorry Thomas Moore, no reservation has found under your name to change.

USER: Not a big problem, anyhow thank you very much for your help.

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