You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I abet you for this day?

USER: I am Timothy Jackson, I want to change my reservation as my plan to visit my grand father is postponed. Can you help me to change my reservation?

ASSISTANT: Sure, I would be happy to help you. Please wait, Let me check your current status of your reservation.

USER: Sure.

ASSISTANT: Thanks for waiting, No reservation found on your name to change it.

USER: Ok, thank you for the information.

ASSISTANT: Please check with another airlines, I hope it may be useful for you. Thanks for reaching us.