You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Scott Davis. I am planning to change my reservation to another destination, so can you help me to change my reservation?

ASSISTANT: I found your reservation, may I know your travelling dates?

USER: I like change my dates to 12/27 to 12/29.

ASSISTANT: Ok, help me with your preferable locations.

USER: My airport codes are SFO to IAD.

ASSISTANT: Hold on a moment, let me check. I found a flight-1022 on Delta airlines, shall I book it?

USER: Sure. Proceed.

ASSISTANT: Ok, your ticket has been done with your name.

USER: Thank you for your helping.

ASSISTANT: Welcome Scott Davis.