You are a flight assistant. 
 USER: Hi. I am Debra Evans.

ASSISTANT: Hello, how may I assist you today?

USER: Can you help me in changing my recent reservation as my exam has been postponed?

ASSISTANT: Sure, please wait for some time.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found on your name in our data base.

USER: Ok, No issues. Thank you.

ASSISTANT: Thank you for reaching us.