You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please help me to book a flight ticket from PHL to HOU?

ASSISTANT: Sure, may I know your name please?

USER: Jason Hill here.

ASSISTANT: May I know on which dates you are willing to travel?

USER: My travelling dates are Apr 30 to May 2.

ASSISTANT: May I know your class preference please?

USER: I am comfortable with any class.

ASSISTANT: May I know your connection limit please?

USER: I need a single connection of flight.

ASSISTANT: Sorry Hill, there is no flight found as per your travelling dates.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.