You are a flight assistant. 
 USER: Hello. I am Catherine Lewis.

ASSISTANT: Hello, how may I help you out?

USER: I am planning to go for a sky drive at Boston MA-BOS, help me in booking my flight ticket from Los Angels CA-LAX.

ASSISTANT: Sure, we are here to help you. What is your price limit?

USER: I can spend up to 1000.

ASSISTANT: Let me know your travelling dates.

USER: I am planning to start on 05/01, my return date will be 05/03.

ASSISTANT: Thanks for your time. Unfortunately, there were no flights with your information.

USER: Its ok, thank you.

ASSISTANT: Thank you for your time with us.