You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Katherine Evans.

ASSISTANT: How may I guide you today, Evans?

USER: I want to change my ticket reservation that when I am booking a ticket it shown with a two connecting flight but now it got emergency and I need a connecting flight to travel, so can you please help me in changing my recent ticket booking?

ASSISTANT: I would be happy to help you with that.

USER: Thanks.

ASSISTANT: Please wait for a while, I will get back with your flight details.

USER: Ok, take your time.

ASSISTANT: Katherine Evans, I am sorry to say that there is no reservation found under your name.

USER: That's fine. Anyway, thank you for your help.

ASSISTANT: Thank you for choosing my agency. Have a great day.

USER: Thank you.