You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: As my tour got postponed I want to change my existing reservation, can you help me with it?

ASSISTANT: Sure, can you please provide your name to check the details of your reservation?

USER: Yes, you can call me as Michael Williams.

ASSISTANT: Ok, found a reservation on your name. Can you please provide your new airport codes?

USER: Ok, I would like to travel from NV-LAS to TX-DFW.

ASSISTANT: Ok, please mention your preferred dates.

USER: My travelling dates are from 12/12 and return on 12/14.

ASSISTANT: Ok, there is a flight 1015 in Delta airline matching your details with price 100.

USER: Please proceed with this booking.

ASSISTANT: Ok, your booking is confirmed.

USER: Thank you for the help.

ASSISTANT: Thanks for reaching us, have a safe journey.