You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I amend you today?

USER: Please book a ticket from New York, NY-LGA to Boston, MA-BOS. I am Pamela Allen.

ASSISTANT: Sure, can you please provide your journey dates?

USER: Departure date is 09/04 and 09/06 is return date.

ASSISTANT: How much you can spend for airfare?

USER: Ticket fare limit is 500.

ASSISTANT: We did not find any flights matching your credentials.

USER: Thanks for the help.

ASSISTANT: Thank you for reaching us.