You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In which way I can aid you today?

USER: I am Pamela Miller. Due to my health problem I want to change my active reservation, can you please help me in that?

ASSISTANT: Sure, I will aid you with that. Please wait a moment, I will check your previous reservation status.

USER: Ok, I will wait.

ASSISTANT: There is no previous reservation available under your name.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Thank you for contacting us.