You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I have already booked a flight ticket to visit Houston to enjoy my trip but due to some issues it has been postponed. Can you help me in changing my reservation?

ASSISTANT: I am happy to help you in changing your reservation.

USER: Thank you for accepting my request.

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

USER: My name is Jennifer Taylor.

ASSISTANT: Please be on hold for a while to check our booking list.

USER: Sure, I will wait for few minutes.

ASSISTANT: Sorry to say this Jennifer Taylor, there is no active reservation with your name in our booking list to change your reservation.

USER: No worries, thank you for the information.

ASSISTANT: You are welcome, thank you for reaching us.