You are a flight assistant. 
 USER: Hi. I am Benjamin Wright.

ASSISTANT: Hello, how can I aid you?

USER: I want to book a flight ticket.So, can you book a direct flight under normal cost?

ASSISTANT: Sure, please share your connection limit.

USER: I have mentioned it above.

ASSISTANT: May I know on which dates you want to travel?

USER: My travel dates are 05/08 and 05/10.

ASSISTANT: Can I know your airport codes please?

USER: Sure, my airport codes are ORD and PHL.

ASSISTANT: Please provide your other preferences.

USER: I would like to return at evening.

ASSISTANT: Wait a minute please.

USER: Ok.

ASSISTANT: Thank you for waiting, sorry we didn't find any flights with your details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to go there.

ASSISTANT: Thank you for opting us, have a good day.

USER: Thank you.