You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, may I know your good name please?

USER: Richard Lee is my name.

ASSISTANT: May I know what kind of service you are expecting from us?

USER: My kid is performing in dance in Providence Children's Film Festival in Las Vegas, So I would  like to attend the event.

ASSISTANT: Sure, I am gleeful to help you. Please share me your travelling dates?

USER: My journey dates on 05/10 and 05/12.

ASSISTANT: May I know your airport codes?

USER: My airport codes are Chicago, ORD to Las Vegas, LAS.

ASSISTANT: Do you have any other limitations?

USER: Yes, I can spend only 500 for airfare.

ASSISTANT: Ok, please wait for a second.

USER: Sure.

ASSISTANT: Thanks for waiting, I apologise that there are no flights found with your specifications.

USER: Ok, no problem. Thank you.

ASSISTANT: Thanks for staying with us, have a good day.