You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Debra Phillips. I need to change my existing reservation, as my exam got postponed. Please help me in changing?

ASSISTANT: Sure, I will help you. Please wait for a minute.

USER: Ok.

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

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

ASSISTANT: Thank you for connecting us.