You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Pamela Miller.

ASSISTANT: How may I assist you today?

USER: Owing an emergency I need to change my reservation, can you help me in changing my reservation ?

ASSISTANT: Sure, give me a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, we did not found any reservation on this name.

USER: Its ok, thank you for your service.

ASSISTANT: Thanks for opting us.