You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: I planned to meet my friend in HOU, can you please help me to book a flight ticket from LGA?

ASSISTANT: Can I know your planned travelling dates?

USER: I prefer to travel on Dec 12 and Dec 14.

ASSISTANT: Do you need any connection limit?

USER: I prefer to travel in a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Michael Collins.

ASSISTANT: There are no flights available on your routes.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for opting us.