You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,.

USER: I am Joshua Lopez.

ASSISTANT: How may I assist you today?

USER: I have planned to go for a Navajo Adventure but, due to some technical issues over there they postponed our trip dates. So can you please help me in changing my existing reservation?

ASSISTANT: Sure, Please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time.

USER: My pleasure.

ASSISTANT: Sorry, we did not find any active reservation in your name.

USER: It's ok, not an issue. Thanks for your information.

ASSISTANT: Thanks for opting us. Have a nice day.