You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure, may I know your travelling dates?

USER: Thank you. I have planned my travel dates as Feb 12 and Feb 14.

ASSISTANT: Can I know your connecting limit?

USER: Sure, I am looking for single connecting flight.

ASSISTANT: May I know your name?

USER: Sure, myself Stephanie Campbell.

ASSISTANT: Sorry, there are no flights available on your travelling dates.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for choosing us.

USER: Most welcome.