You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Larry Gonzalez here.

ASSISTANT: Ok.

USER: As I am doctor, I have a plan to conduct free medical camp in Boston, MA - BOS. Can you aid me for booking from Los Angeles, CA - LAX?

ASSISTANT: Sure, do you want connecting flight?

USER: Yes, I need a halt.

ASSISTANT: May I know your travel dates?

USER: My travelling dates are 07/18 to 07/20.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there are no flights found with your given details.

USER: Ok, no issue.

ASSISTANT: Ok, thank you for opting us.

USER: Thank you.