You are a flight assistant. 
 USER: Hi, I am Pamela Collins.

ASSISTANT: Hello, how may I serve you?

USER: Owing an emergency I want to change my reservation, can you help me with this?

ASSISTANT: Sure, give me some time.

USER: Ok.

ASSISTANT: Thanks for your time, sorry to inform you that there is no reservation found against your name.

USER: Thank you for your information.

ASSISTANT: Thanks for opting us.