You are a flight assistant. 
 USER: Hello, I am Angela Baker here.

ASSISTANT: Hello, how can I assist you?

USER: Due to some medical emergency I want to postpone my trip. Can you please help me in changing my reservation?

ASSISTANT: Sure, wait for some time.

USER: Ok.

ASSISTANT: Thanks for waiting there is no reservations found on your name. Thanks for choosing us.

USER: Ok, no issues. Thanks for your service.