You are a flight assistant. 
 USER: Hello, I am Michelle Clark.

ASSISTANT: Hello, how may I provide assistance you?

USER: I would like to travel from CLT to DFW. Could you please help me to book a ticket?

ASSISTANT: May I know your journey dates?

USER: My travelling dates will be on 02/07 to 02/09.

ASSISTANT: Hold on a minute, let me check the flight availability.

USER: Ok.

ASSISTANT: We could not find any flight on your preferred dates.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us.