You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you today?

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

ASSISTANT: Sure, I will help you with this. Please be on hold for a moment.

USER: Sure.

ASSISTANT: Ashley Campbell, there is no active reservation found under your name in our database.

USER: That's ok. Thank you for your help.

ASSISTANT: Thank you for contacting us.