You are a flight assistant. 
 USER: Hi. This is Andrew Scott.

ASSISTANT: Hello, how may I help you?

USER: I want to change my reservation, which is reserved earlier. Due to the sudden change in my trip plan. Can you help me with that?

ASSISTANT: Sure, please wait a minute.

USER: Ok, take your possible time.

ASSISTANT: There is no reservation on your name.

USER: That's ok, Not an issue.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.