You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what type of service you are looking form us?

USER: Actually my Snooker's Competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, I will definitely help you about it. Can you please provide the name on which you have done your booking?

USER: Sure, the previous reservation is done under the name Jerry Gonzalez.

ASSISTANT: Sorry Gonzalez, I have checked in our database but have not find any reservation under the name you have mentioned.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Fine, thank you for opting our service. Hope you have a great day ahead.