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

ASSISTANT: Hello, how may I abet you?

USER: As my adventurous trip got postponed I want to change my reservation, can you help me with it please?

ASSISTANT: Sure, we are here to help you. Please give me a moment to check your details and let you know.

USER: Ok.

ASSISTANT: Sorry to inform you that there is no reservation exist on your name.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you for choosing our service.