You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Jason Martinez.

ASSISTANT: How may I provide assistance for you?

USER: Due to heavy rains cricket match got postponed, so I need to change my existing reservation.

ASSISTANT: Ok. Give me a minute, I will check the previous list and let you know the details of it.

USER: Ok.

ASSISTANT: Thank you for your time, no reservation found on your name.

USER: It's Ok, thanks for your response.

ASSISTANT: Thank you for reaching us, have a nice day.