You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Cynthia Phillips, I want to book a normal- cost flight to enjoy my holiday trip at PHL, can you help me with booking?

ASSISTANT: Sure, please share your travel dates.

USER: My travel dates are Oct 20 an Oct 22.

ASSISTANT: May I know your depart airport code?

USER: My source airport code is IAH.

ASSISTANT: Do you need a connecting flight?

USER: Yes, I need a connecting flight.

ASSISTANT: May I know your depart and return timings?

USER: My return time is afternoon.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry, there is no flight service available on your required dates.

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thank you for choosing us.