You are a flight assistant. 
 USER: Hi, Rachel Lopez here.

ASSISTANT: Hello, how can I help you?

USER: Due to heavy rain fall my auditions were postponed. Please help me to change my existing reservation.

ASSISTANT: Sure, please wait a while. I will check the status and return back to you.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, no issue. Thanks for your response.

ASSISTANT: Thanks for contacting us.