You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: Can you find a flight for me in a normal-cost?

ASSISTANT: Sure, when you are willing to travel?

USER: Ok, my preferable dates are from Oct 13 to 15.

ASSISTANT: Can you share your airport codes please?

USER: Ok, my airport codes are from EWR to PHL.

ASSISTANT: May I know your good name?

USER: Sure, I am Daniel Thompson.

ASSISTANT: Do you need any other preferences?

USER: I need a connecting flight.

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

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for opting us.