You are a flight assistant. 
 USER: Hello. I am Christopher Williams.

ASSISTANT: Hello, How can I assist you?

USER: Can you help me booking a flight ticket from LGA to LAX?

ASSISTANT: Sure, May I know the journey dates?

USER: I will start on Jan, 11 and return on Jan, 13.

ASSISTANT: Do you have any connection limit?

USER: I need a break in my journey.

ASSISTANT: Do you have any class preference?

USER: I am comfortable with any class.

ASSISTANT: Do you have any other requirements?

USER: I will start in the afternoon time.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No flights found with your preferable dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for opting us.