You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Rebecca Lewis.

ASSISTANT: How can I help you?

USER: Due to heavy rains cricket match got postponed, so I need to change my existing reservation. Can you please help me?

ASSISTANT: Sure, let me check me your reservation status in our database.

USER: Sure, take your own time.

ASSISTANT: Sorry, I did not find any reservation by your name in our database.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.