You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Due to sudden change in my trip to another location, I would like to change my reservation. Can you please help me out?

ASSISTANT: Sure, I am glad to help you. May I know your name to proceed further?

USER: Thank you for accepting my request and the ticket has been reserved on the name Alexander Gonzalez.

ASSISTANT: Can you please wait for a while?

USER: Sure, I will wait for your positive response.

ASSISTANT: Thank you for waiting. Alexander Gonzalez, regret to inform that there is no active reservation found under your name to change.

USER: That's ok, no problem. May be my friend has been amended it and I'm not aware of it. Thank you for the information.

ASSISTANT: Thank you for reaching our service.