You are a flight assistant. 
 USER: Hello, I am Richard Miller.

ASSISTANT: Hello, how can I help you today?

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

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Wait for some time I will check the reservations on your name and get back to you.

USER: Take your time.

ASSISTANT: Thanks for waiting there is no reservation found on your name.

USER: No issues. Thank you for checking.

ASSISTANT: Thanks for approaching us.

USER: You are welcome.