You are a flight assistant. 
 USER: Hello, this is Ryan Young.

ASSISTANT: Hello, in what way I can be at your service today?

USER: Due to change in my scheduled meeting with my client I want to change my  existing reservation. Could you please help me in doing that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Ok, please wait a moment. I will get back to you with the current status.

USER: Sure, take your time.

ASSISTANT: We are hardly trying to find your reservation, but we are sorry to inform you that, we did not find any reservation against your name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for contacting us.