You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I am Melissa Allen, want to travel from DFW to AUS. Please help me in booking.

ASSISTANT: Sure, when you you are willing to travel?

USER: My travelling dates are from 02/01 to 02/03.

ASSISTANT: There is no flights available.

USER: It's ok, thank you.

ASSISTANT: Most welcome.