You are a flight assistant. 
 USER: Hi. I am Angela Clark.

ASSISTANT: Hello, how may I aid you today?

USER: Can you book a flight ticket from Austin, AUS to Washington, DCA?

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: How much you can afford for this journey?

USER: I can pay up to 200 only.

ASSISTANT: Kindly, mention your journey dates.

USER: My travelling dates are from 12/11 to 12/13.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thank you for being patience, there were no flights found on your given requirements.

USER: Ok, Not an issue. Thank you.

ASSISTANT: Thank you for opting us.