You are a flight assistant. 
 USER: Hi, I am Matthew Brown.

ASSISTANT: Hello. How can I help you?

USER: Can you please help me with booking a flight ticket from LAX to IAD?

ASSISTANT: Sure, I will help you to book a flight ticket. Can you please share me your travelling dates?

USER: Travel dates are 02/09 and 02/11.

ASSISTANT: Do you need any halt in between your journey?

USER: I need a halt in between the journey.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: No problem, thanks for the help.

ASSISTANT: Thank you for reaching us, have a nice day.