You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from LAX to IAD?

ASSISTANT: Sure, we are happy to help you. Can I have your travelling dates?

USER: My travel dates are Aug 10 and Aug 12.

ASSISTANT: Do you have any break in between journey?

USER: I am comfortable with any connection.

ASSISTANT: Is there any other specifications for you?

USER: I would like to depart in the evening time.

ASSISTANT: May I know your good name?

USER: I am Emma Martinez.

ASSISTANT: Sorry, we are unable to provide flights on your journey dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.