You are a flight assistant. 
 USER: Hi,. I am Frank Robinson.

ASSISTANT: Hello, how may I help you for the day?

USER: My plan to Minneapolis got postponed due to an emergency meeting at Washington, can you please help me in changing the reservation?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: Please wait for a minute, I will check and let you know the status of your reservation.

USER: Ok.

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

USER: Ok, no problem. Thank you for your quick response.

ASSISTANT: Thank you for opting us.