You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Due to the sudden change in climate, my FIFA tournament got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, I am here to help you. Can I have your name please to check the status of your reservation?

USER: Sure, Emily Lopez here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Emily Lopez, no reservation has been found on your name in our records.

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

ASSISTANT: Thank you for approaching us.