You are a flight assistant. 
 USER: Hello, I am Patrick Garcia.

ASSISTANT: Hello, how can I be your helping hand?

USER: I want to book a flight ticket from AUS to DFW, can you please book a flight ticket?

ASSISTANT: Sure, do you have any requirements to met?

USER: I need a halt with fare 1000.

ASSISTANT: Can I have your travelling dates please?

USER: The trip dates are 04/01 to 04/03.

ASSISTANT: Thank you for your details. Please, wait for a while.

USER: Sure.

ASSISTANT: Thank you for being patience. Unfortunately, there are no flights available with your requirements.

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

ASSISTANT: Thank you for reaching us.