You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: As my meeting got postponed at Houston, could you please help me by changing my existing reservation?

ASSISTANT: Ok, please provide me the reservation name which you have done recently.

USER: My name is Kimberly Miller.

ASSISTANT: Ok Kimberly, I will check for the status of your reservation and come back to you. Please wait.

USER: Sure, I will wait for your information.

ASSISTANT: Sorry, there is no reservation been done on your name as per our records.

USER: Oh! May be something went wrong while booking the ticket previously. Anyways, thank you for providing information.

ASSISTANT: Thank you for assisting me.