You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Can I please have your name?

USER: I am Alexander Mitchell.

ASSISTANT: Is there anything specific that you would like me to help you with?

USER: Yes, I want to change my existing reservation as my trip has postponed due to heavy rains. Can you please help me?

ASSISTANT: Sure, give me a minute.

USER: Ok.

ASSISTANT: Sorry to say that there is no reservation found, as per your name.

USER: No issues. Thank you for your time.

ASSISTANT: Thank you for providing me with your details.