You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you today?

USER: Can you please change my recent reservation which I have done with my name Alexander Phillips.

ASSISTANT: Sure, please wait for a minute.

USER: Sure, take your time.

ASSISTANT: I could not find any reservation with your name.

USER: It's ok, thanks for your information.

ASSISTANT: It's my pleasure, have a great day.