You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am James Phillips.

ASSISTANT: In what way shall I assist you now?

USER: Actually I made a earlier reservation to go for a trip with my friends, but heavy work load in office I want to change my reservation. Can you help me with it please?

ASSISTANT: Ok. Give a minute.

USER: Ok.

ASSISTANT: Thanks for your time. I checked the existing reservation but there was no reservation on your name.

USER: That's ok.

ASSISTANT: Thank you for choosing us.

USER: Thank you for the response.