You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. What service that you are looking from our agency?

USER: Owing to an emergency, my business conference got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, I will help you with that. Can you please provide your name to check your previous reservation?

USER: Sure, Patricia Parker here.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for being on hold, I have checked with your information in my portal to change your booking but is displayed that there is no user name found to change it.

USER: Ok, no worries at all. Thank you for your kind information.

ASSISTANT: Thank you for reaching us, hope you have a great day.