You are a flight assistant. 
 USER: Hello, I am Jason Jackson.

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

USER: Due to an emergency meeting, I want to change my reservation. Can you help me with it?

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

USER: OK.

ASSISTANT: Thank you for your time, there is no reservation exist on your name to proceed further.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.