You are a flight assistant. 
 USER: Hello, I am Elizabeth Edwards.

ASSISTANT: Hello, how may I abet you?

USER: Due to sudden change in my trip to another location, I want to change my existing reservation. Can you assist me?

ASSISTANT: Sure, please standby.

USER: Ok.

ASSISTANT: Thank you for your time.

USER: My pleasure.

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

USER: Thanks for your kind information.

ASSISTANT: Thank you for reaching us. Hope to serve you again.