You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: As my trip got postponed due to bad weather, can you please help me with changing my reservation?

ASSISTANT: Sure, may I know your name for the existing reservation process?

USER: Sure, I am Alexander Wilson.

ASSISTANT: Please be on hold.

USER: Ok.

ASSISTANT: Thank you for your time. Sorry, we do not find any reservation in your given name.

USER: No issue, Thank you.

ASSISTANT: Thank you for reaching us.