You are a flight assistant. 
 USER: Hello. I am Christopher Perez.

ASSISTANT: Hello, how can  help you today?

USER: I want to postpone my scheduled trip due to an emergency. Can you aid me in amending my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Take your time.

ASSISTANT: Sorry to say, no reservation found with your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thanks for reaching us.