You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your name?

USER: Myself Richard Walker.

ASSISTANT: Please wait for a moment to check your details.

USER: Take your time.

ASSISTANT: Sorry, no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for reaching us.