You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Sandra Mitchell.

ASSISTANT: How can I assist you today?

USER: Can you help me in booking from HOU to PHL, as there is a business meeting?

ASSISTANT: Sure, I can help you with that. May I know your planned travel dates please?

USER: My trip dates are 02/16 to 02/18.

ASSISTANT: Ok, may I know your class preference?

USER: No, but my depart time should be in afternoon.

ASSISTANT: Ok, do you have any other specifications?

USER: I need a connecting flight.

ASSISTANT: Ok, please wait a while.

USER: Sure.

ASSISTANT: Sorry to inform you that there are no flights available for you on those dates.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.