You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am Joshua White. Can you help me in booking a flight ticket from CA - LAX to TX - IAH?

ASSISTANT: Sure, we are here to help you. May I know your travel dates?

USER: I want to fly on 01/02 and return on 01/04.

ASSISTANT: How much can you afford for this journey?

USER: I can afford upto 500.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thanks for reaching us.