You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: As I am in emergency to travel Charlotte, so I want to book a direct flight from PHX. Can you please help me to book a flight ticket?

ASSISTANT: Ok, may I know your dates of journey please?

USER: My dates of journey are 04/19 and 04/21.

ASSISTANT: Sure, may I know your destination airport code please?

USER: My destination airport code is CLT.

ASSISTANT: Please hold on for a moment. May I know your name please?

USER: I am Lisa Nelson.

ASSISTANT: I found a flight with the connections limit 1 of cost 100, shall I book this ticket?

USER: Yes, please proceed for booking.

ASSISTANT: Your ticket has been reserved with the number 1028 of airline FRontier.

USER: Thank you for your help.

ASSISTANT: You are welcome.