You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I support you?

USER: I am Margaret Clrak. I want to book a flight ticket to attend Dallas International Auto Show, they are exhibiting more than 400 vehicles from many branded companies. Can you please help me?

ASSISTANT: Sure, may I know when are you planning to make your journey?

USER: I am planning to travel on 07/07 and return on 07/09.

ASSISTANT: Do you need a lay over?

USER: I need a lay over.

ASSISTANT: Kindly mention your airport codes.

USER: My boarding is at  LGA and landing is at DFW.

ASSISTANT: Is there are price limit?

USER: My price limit is 1000.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thanks for being patient, It's unfortunate that there are no flights available on your requested dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.