You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I best serve you?

USER: I am Rebecca Jackson. There is art museum in Chicago but due to some reason I can not go can you change the reservation to other day?

ASSISTANT: Sure, I can change your reservation right now. Please wait for a while.

USER: Ok, take your own time.

ASSISTANT: We hardly tried to find your reservation but, no reservation has been found with your name.

USER: That's ok, thank you for the support in assisting me.

ASSISTANT: Thanks for contacting us, have a nice a day.