You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you today?

USER: Owing to an emergency, I want to change my existing reservation.

ASSISTANT: Sure,may I know your name to check whether your reservation is available or not?

USER: Sure, Pamela Martin here.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name.

USER: Ok, no worries at all. Thank you for your assistance.

ASSISTANT: Thank you for opting us.