You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be your guide for today?

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

ASSISTANT: I am glad to help you in amending your reservation.

USER: Thank you.

ASSISTANT: Could you please provide your name to check our booking list about the reservation status with your name?

USER: I have booked the name Charles Turner.

ASSISTANT: Please be on hold for sometime to check the active reservation with your name in our list.

USER: Yes, you can take your time.

ASSISTANT: I regret to say this Charles Turner, there is no active reservation with your name in our booking list.

USER: No issues. Thank you for checking.

ASSISTANT: You are welcome, thank you for choosing our service.