You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Kimberly Davis.

ASSISTANT: How can I assist you?

USER: As my meeting got postponed, I would like to change my existing reservation to Houston. Can you help me with this?

ASSISTANT: Sure, I'll help you in that. Please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Davis, there is no reservation found under your name to do changes in that.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.