You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I render you?

USER: Will you be my helping hand in changing my reservation as my schedule to attend for meeting with manager got postponed?

ASSISTANT: Sure. Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: It's ok, thank you for your kind information.

ASSISTANT: Thank you for choosing us.