You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: My name is Brian Gonzalez. I want to reschedule my journey dates to go for a  trip. So, help me in changing the reservation.

ASSISTANT: Ok, please wait I will revert you in a  moment.

USER: Sure, take your time.

ASSISTANT:  Sorry, no reservation was found on your name.

USER: No worries at all. Thank you for your kind information.

ASSISTANT: Thank you for availing us.