You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I am planning to go for racing competition but suddenly my plan got changed, so that I want to change my existing reservation. Can you help me?

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

USER: Ok, I am Richard Mitchell.

ASSISTANT: Thank you, please wait for a while.

USER: Sure.

ASSISTANT: We have found your reservation, can you please help me with your travel dates?

USER: Ok, my planned trip dates are on Dec 29 and return on Dec 31.

ASSISTANT: May I know your airport codes?

USER: I want to start journey from MSP to SFO.

ASSISTANT: Is there any class preferences?

USER: No.

ASSISTANT: Do you prefer for direct flight or connecting flight?

USER: I need a single connecting flight to travel.

ASSISTANT: Flight-1027 is available in AA airlines with single connection and the ticket fare is 100. Can I proceed?

USER: Ok, you can proceed with the ticket booking.

ASSISTANT: Your booking is confirmed.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.