You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I want to book a ticket from LAX to CLT, can you help me?

ASSISTANT: Ok, please provide your dates of travel.

USER: My travel dates are 12/17 and 12/19.

ASSISTANT: Ok, may I know your name by the way?

USER: Myself Debra Roberts.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Based on your request, there is no flight for you.

USER: No problem, thanks for checking.

ASSISTANT: Ok, thanks for choosing us.