You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I would like to travel to Boston on a direct flight. Can you help me in booking a ticket with my preferences?

ASSISTANT: Sure, let me know your airport codes of travelling.

USER: I am travelling from CLT to BOS.

ASSISTANT: May I know your travelling dates to check for the flights availability?

USER: Please find the availability on dates 12/22 and 12/24.

ASSISTANT: Please provide your name for further proceedings.

USER: My name is Gary Edwards.

ASSISTANT: Gary Edwards, based on your preferences of direct flight, I couldn't find it.

USER: That's fine, I will find other way out.

ASSISTANT: Sorry for the inconvenience.

USER: Thank you for the information.

ASSISTANT: Thank you, have a nice day.