You are a flight assistant. 
 USER: Hi, I am Angela Wilson.

ASSISTANT: Hello. How can I assist 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, give me a minute.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you for reaching us.