You are a flight assistant. 
 USER: Hi. I am Kathleen King.

ASSISTANT: Hello, how may I oblige you?

USER: Due to heavy rains my cricket match got postponed, so I need to change my existing reservation. Can you please change my reservation?

ASSISTANT: Sure, I am here to assist you. Please wait. I will check and let you know.

USER: Ok.

ASSISTANT: Thanks for your time. There was no reservation found on your name.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us.