You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,. How can I serve you?

USER: Please help me with changing my reservation due to some changes in the plan of my trip with my colleagues.

ASSISTANT: Sure, may I know your name please?

USER: Sure, my name is Ashley Smith.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Sorry Ashley Smith, we did not find any reservation on your name.

USER: No worries, thank you for your valuable time.

ASSISTANT: Thanks for contacting us.