You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I assist you?

USER: Please book me a flight ticket to Charlotte, As I have an emergency case to deal with? Can you help me with that?

ASSISTANT: Sure, I am here t help you.

USER: Thank you.

ASSISTANT: May I know when you want to travel?

USER: I am willing to travel on 12/21 & return on 12/23.

ASSISTANT: Ok, please share your journey codes.

USER: I want to board from Atlanta, GA - ATL to reach NC - CLT.

ASSISTANT: How much you can afford for this journey?

USER: I can afford only 500 for my ticket.

ASSISTANT: Ok, please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry to say no flights found with your details.

USER: Ok, no problem at all.

ASSISTANT: Please share your name.

USER: Thanks for informing me. I am David Scott.

ASSISTANT: Thank you, have a nice day.