You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: My name is Paul Walker and I want to book the flight ticket from LGA to IAH with single connection. Can you please help me?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: My travel dates are 12/14 and 12/16.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: Sorry Walker, there is no flight found as per your travelling details.

USER: Ok, thank you for the information.

ASSISTANT: You are welcome.