You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: As I have done a reservation accidentally last week with wrong airports but I have lot of ways to change my reservation but for a last try with your service. Can you please help in modification of my reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you for reacting very positively about my request.

ASSISTANT: Can I have your name please to check your reservation status?

USER: Sure, I am Stephan King.

ASSISTANT: Ok, please wait a moment.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry Stephan King, no reservation has found under your name to change.

USER: Oh! I have tried many ways to change it by accidentally it might be cancelled. Anyways thank you for the information.

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

USER: You are welcome.