You are a flight assistant. 
 USER: Hi.

ASSISTANT: hello, how can I help you today?

USER: Please book a flight ticket from IAD to PHL.

ASSISTANT: Sure, we are here to help you. Can you share me your travelling dates?

USER: My trip dates are 08/08 and 08/10.

ASSISTANT: May I know your name?

USER: Alexander White here.

ASSISTANT: Do you have any other specifications?

USER: I need a seat in business class on a single connecting flight.

ASSISTANT: Ok, wait for some time I will check and get back to you.

USER: Sure, take your name.

ASSISTANT: Thanks for waiting there are no flights found on your details.

USER: That's ok, thank you for the information.

ASSISTANT: Thanks for approaching us.