You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Baker.

ASSISTANT: May I know what kind of services you are looking for, Baker?

USER: I want to celebrate my birthday party at CLT, I want to book a ticket. Please help me out.

ASSISTANT: Sure Alexander, can you provide me your journey dates please?

USER: My journey dates are from 03/09 to 03/11.

ASSISTANT: From where would you like to start your journey?

USER: My origin airport code is PHL.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: I found an economy flight with price 100 from AA airlines. Shall I book the ticket?

USER: I am looking for a direct flight.

ASSISTANT: Sorry Alexander, there are no direct flights available at this moment with your request.

USER: Ok, no problem, thank you for your response.

ASSISTANT: Thank you for choosing our services. Have a nice day.