You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: I would like to book a ticket from HOU to PHL, can you please help me with that?

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: The travel dates are from 06/21 to 06/23.

ASSISTANT: Is there any connection limit for you?

USER: I need a flight with 1 connection limit.

ASSISTANT:  May I know if you prefer to have any other comforts in your journey?

USER: No.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: Patrick Clark here.

ASSISTANT: Sorry, no flights are available in this route as per your requested dates.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.