You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you?

USER: As my meeting got postponed with my client at Houston, can you please help me in changing my existing reservation to Houston?

ASSISTANT: Sure, May I know your name?

USER: Sure, the ticket has been reserved on the name Edward Anderson.

ASSISTANT: Please wait a second.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No reservation found on your name.

USER: That's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for opting us.