You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephanie Lewis.

ASSISTANT: How may I help you Stephanie?

USER: I want to change my existing reservation, due to live football match were postponed. Can you help me with this?

ASSISTANT: Ok, I will help you out in changing your reservation.

USER: Thank you.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry, there are no reservations found with this name.

USER: Not an issue. Thank you for quick response.

ASSISTANT: Thank you for choosing our services.