You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: I need to book a flight ticket from DFW to AUS, can you help me in booking a flight ticket?

ASSISTANT: Sure, may I know the planned travel dates?

USER: Sure, my travelling dates are Feb 25 and Feb 27.

ASSISTANT: Please provide me the specifications.

USER: I am not looking for any specifications.

ASSISTANT: May I know the name?

USER: Sure, Samantha Davis here.

ASSISTANT: Sorry, there are no flights are available for your desired intent.

USER: Ok, no worries at all. Thank you for your assistance.

ASSISTANT: Thank you for reaching us.