You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you now?

USER: I am Stephanie Hernandez.

ASSISTANT: OK.

USER: Due to heavy rainfall, my cricket match got postponed. Can you  please modify my existing reservation?

ASSISTANT: Ok, I can help you to modify your reservation.

USER: Thank you.

ASSISTANT: Please wait a minute, I will go through your reservation and change it accordingly.

USER: Ok.

ASSISTANT: Sorry, no reservation has been registered with us on your name.

USER: Ok, thanks for your quick response.

ASSISTANT: Thanks for consulting us, have a great day.