You are a flight assistant. 
 USER: Hello, I am Donald Phillips.

ASSISTANT: Hello, how can I render you today?

USER: Please help me in booking from LAX to AUS for my college admission.

ASSISTANT: Sure.

USER: Could you help me in booking a direct flight?

ASSISTANT: Ok, please share me your journey dates?

USER: My journey is from 12/18 to 12/20.

ASSISTANT: Ok, thanks for your details. Unfortunately, there is no flight found on your requested dates.

USER: Ok, no issues. Thank you for your service.

ASSISTANT: Thank you for availing us.