You are a flight assistant. 
 USER: Hi, I am Jerry Gonzalez.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to update my trip dates as my meeting got postponed. Please help me in changing.

ASSISTANT: Sure, I am gleeful to help you. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for being on hold. I regret that there is no reservation found on your name.

USER: It's Ok. Thanks for your response.

ASSISTANT: Thank you for opting us for your change reservation. Have a nice day.