You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?

ASSISTANT: Sure, I am here to help you with your concern.

USER: Thank you.

ASSISTANT: Can I have your name please to check the status of your reservation?

USER: I am Deborah Collins.

ASSISTANT: Please hold on a moment.

USER: Sure.

ASSISTANT: Deborah Collins, I have found your reservation. Can I have your airport codes please?

USER:  I need to leave from my nearest airport IAH to reach LAS.

ASSISTANT: May I know your planned travel dates please?

USER: I want to travel on 07/05, and return on 07/07.

ASSISTANT: Do you need a connecting flight?

USER: I need a break in my journey.

ASSISTANT: May I know your class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: I found an economy class in  United Airlines with fare 100 and it has single connection. Can I proceed?

USER: Proceed with the booking.

ASSISTANT: Ok, your booking is confirmed with flight number 1005.

USER: Thanks for the help.

ASSISTANT: Thank you for choosing us, hope you visit us again.