You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: I want to book a direct flight to reach Austin, AUS as it is a urgent case, can you help me in booking a flight ticket?

ASSISTANT: Sure, when are you planning to travel?

USER: I am planning to travel on 12/26 and 12/28.

ASSISTANT: Let me know your origin airport code?

USER: Sure, it's LAS.

ASSISTANT: May I know your name?

USER: Sure, I am Kenneth Hernandez.

ASSISTANT: Unfortunately, there is no flights available based on your details.

USER: No issues, I will choose another. Thank you for your time.

ASSISTANT: Thank you for choosing us.