You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

USER: I am Andrew Edwards and help me in changing the reservation, as my conference got postponed.

ASSISTANT: Ok.

USER: This is the reason, I need your assistance for changing the reservation.

ASSISTANT: Sure. Please, wait.

USER: Ok, thank you.

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

USER: Ok. Thank you for your quick response.

ASSISTANT: Thank you for reaching us.