You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Alexander Miller this side. I am looking for a normal cost airline for my journey, can you please check out is there any flight available between PHL and SEA?

ASSISTANT: Sure, may I know your travelling dates please?

USER: Thank you for accepting my request, my departure is on Aug 07 and please book my return ticket also on Aug 09.

ASSISTANT: Ok, do you need any connection in between the journey?

USER: Yes, I need single connection.

ASSISTANT: Do you have class preference?

USER: I want business class.

ASSISTANT: Ok, please let me know if you have any other specifications.

USER: No, I don't have any other specifications.

ASSISTANT: Wait a minute please.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting, sorry no flights found with your details.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

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

USER: Welcome.