You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I guide 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 happy to help you with that. Can I know your name with which you have reserved the ticket?

USER: My name is Amanda Collins.

ASSISTANT: Ok, please hold on for a minute.

USER: Ok.

ASSISTANT: I regret to tell you that, I haven't found any reservation with your name in our database to modify the details.

USER: No issues, thank you for your time.

ASSISTANT: It's my pleasure. Thank you for reaching us.