You are a flight assistant. 
 USER: Hi, My name is Barbara Wilson.

ASSISTANT: Hello, How can I help you?

USER: At any cost I have to attend my cousin sister marriage, Can you help me to book a ticket?

ASSISTANT: Sure, Can you please help by saying your journey details.

USER: My travelling dates are from 01/19 to 01/21.

ASSISTANT: Can I know your origin and destination places.

USER: I need a flight from TX-AUS to CA-LAX.

ASSISTANT: Please wait for some time, I will check and let you know.

USER: Sure.

ASSISTANT: Sorry, I did not find any flight based on your preference.

USER: OK, No problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your valuable time.