You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: I have postponed my recent travel, can you please help me to change my recent reservation?

ASSISTANT: Sure, please provide me your details?

USER: Myself Anna Phillips.

ASSISTANT: Just a second please.

USER: Ok.

ASSISTANT: I am sorry Mr.Anna Phillips, i cannot find any reservation on your name. Thank you, have a nice day.

USER: Ok, thank you for your service.