You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to flight travelling agency, what assistance that you are looking from my side?

USER: Actually my Snooker's competition is postponed, so that I want to change my existing reservation. Can you help me?

ASSISTANT: Sure, our agency can help you in changing process also with our any charge.

USER: Thank you for accepting my request.

ASSISTANT: It's alright and I have to know some basic information like name from your side, can you please share it?

USER: Ok, my name is Christopher Robinson.

ASSISTANT: That's good, please give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Ok, I appreciate your patience and I would like to inform you that your booking is not done due to some technical problems and the ticket is not confirmed from your end to change it.

USER: Thank you. That's ok, not an issue. Anyway's thank you for your great service.

ASSISTANT: Ok fine, thank you for your valuable time in reaching us. Have a great day.