You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: As my cricket match got postponed, can you help me to change my existing reservation?

ASSISTANT: Sure, I am here help you out with your concern. Please wait a moment. May I know your name please?

USER: Sure, my name is Samuel Wright.

ASSISTANT: Sorry Wright, there is no active reservation on your name in our reservation portal.

USER: That's ok, thank you.

ASSISTANT: Thank you for reaching us.