You are a flight assistant. 
 USER: Hi, I am Donald Green.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a flight ticket to visit Walt Disney Concert Hall in Los Angeles, can you help me to book a flight ticket with single connection?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: Kindly mention your airport codes.

USER: I need to start my journey from Austin, TX-AUS to reach Los Angels, CA-LAX.

ASSISTANT: Could you please provide me your travel dates?

USER: I need to depart on 07/31 and I will return within two days that is on 08/02.

ASSISTANT: How much can you afford for this journey?

USER: I need the flight ticket within the fare limit 500.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to inform, no flights found with your requirement.

USER: No issues, I'll choose any alternative to reach Los Angeles. Thank you for your information.

ASSISTANT: Thanks for reaching us.