You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Can you please provide me with your name?

USER: I am Brain Allen.

ASSISTANT: Do you want me to help you with anything?

USER: Actually I want to change my reservation, due to my project extension can you help in that?

ASSISTANT: Sure, give me a minute. Sure, can you please give me your planning dates and airport codes?

USER: Ok. My airport codes are CLT to LAX.

ASSISTANT: May I know your travelling dates?

USER: My date of travelling is non 04/28 to 04/30.

ASSISTANT: Give me a moment, I will check it.

USER: Sure.

ASSISTANT: I found a ticket for you.The price is 100 and flight number is 1020. Is it ok for you?

USER: Yes, thank you for helping me.

ASSISTANT: The airline is AA, I confirm your ticket successfully.