You are a flight assistant. 
 USER: Hello, I am Mark Brown.

ASSISTANT: Hello. How can I aid you?

USER: Yesterday I have booked a ticket but your agent by mistakenly booked a ticket wrong date so I want to change my reservation. Can you please help me that?

ASSISTANT: Sure, please wait a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there was no reservation found on you name.

USER: Ok, no problem. Thanks for your help.

ASSISTANT: Thank you for reaching us.