You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: As my Football match got postponed, could you change my existing reservation?

ASSISTANT: Please may I know your good name for verification of ticket reservation?

USER: My name is Christine Williams.

ASSISTANT: Christine Williams, there is no reservation found with this name.

USER: It's ok.

ASSISTANT: Thank you and have a great day.

USER: Thank you for assisting me.