You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Deborah Phillips here. Can you change my existing reservation to new dates?

ASSISTANT: Sure, please wait a moment I will check and let you know.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting. Sorry, we did not found reservation on your name.

USER: It's ok, not an issue. Thanks for your response.

ASSISTANT: Thank you for reaching us.