You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Justin Lewis.

ASSISTANT: How can I help you?

USER: I want to fly from CLT to LAS. Please book a ticket for me.

ASSISTANT: May I know the dates of travel?

USER: I would like to go on 11/09 and return on 11/11.

ASSISTANT: Sorry for the inconvenience, there are no flights available for you based on your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.