You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I have an earlier reservation to sign a new contract for new project, due to some problems it got postponed. Can you please help me in changing my reservation.

ASSISTANT: Sure, let me know your name to check your reservation details in our database.

USER: Thank you for considering my request. I have done it on the name of Dorothy Smith.

ASSISTANT: Thank you for the information, please wait for a while.

USER: Sure, take your time.

ASSISTANT: I'm happy to inform you that I have found a active reservation on your name.

USER: That's great.

ASSISTANT: Can you please help me with your trip dates?

USER: Sure, my boarding is on Oct 22 and please book my return ticket on Oct 24.

ASSISTANT: May I know your airport codes?

USER: I will prefer ATL and LAS as my origin and destination airports respectively.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: Do you have any airline preferences?

USER: No.

ASSISTANT: Flight-1012 is available in UA airlines with single connection and the ticket fare is 200. Can I proceed?

USER: I am ok with this flight, you can proceed with booking now.

ASSISTANT: Your booking is confirmed and have a safe journey.

USER: Thank you for your assistance.

ASSISTANT: Thank you for connecting us.

USER: Welcome.