You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I am Brandon Allen. Can you please help me with booking a flight ticket from IAH to PHL?

ASSISTANT: Sure, please let me know your trip dates.

USER: My trip dates are 12/31 and 01/02.

ASSISTANT: At what time would you like to depart and return?

USER: I would like to return date at afternoon.

ASSISTANT: How many connections are you looking for?

USER: I need a connecting flight.

ASSISTANT: Do you need an economy class or business class?

USER: I am comfortable with any class.

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Thank you for waiting, I regret to inform you that there are no flights obtained on your journey dates to book a flight ticket.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thank you for opting us.