You are a flight assistant. 
 ASSISTANT: Hello, how may I serve you?

USER: Hi, I am Robert Thomas. Due to heavy rains at other place I am willing to cancel my trip. And would like to change my existing reservation from one place to another. could you please help change my reservation place?

ASSISTANT: Sorry there is no reservation found on your name. Thank you for reaching out to us.

USER: Ok, Thanks for your service.