You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. In what way may I amend you now?

USER: As my football match was postponed, I would like to change my existing reservation. Can you assist me with this?

ASSISTANT: Sure. To change your reservation, may I have your name please?

USER: Ok. I am Samantha Mitchell.

ASSISTANT: Thanks for your details.

USER: Ok.

ASSISTANT: You have no reservation found on your name.

USER: Thanks for quick response.

ASSISTANT: Thank you for opting us.