You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, my meeting with client got postponed. So I want you to change my existing reservation.

ASSISTANT: Sure, may I know your name?

USER: Sure, Brandon Adams here.

ASSISTANT: Hold on a minute.

USER: Sure.

ASSISTANT: We cloud not find any reservation on your name.

USER: Ok, no issues. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.