You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Catherine Adams. Can you please help me in changing my existing reservation, as my soccer match got postponed to some other date.

ASSISTANT: Sure, I am happy to help you. Please wait, I will check your reservation status and let you know.

USER: Ok.

ASSISTANT: Sorry Catherine Adams, I did not find any reservation under your name in our database.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: You are welcome and thank you for choosing us.