You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I want to travel in a business class flight, can you please find out a flight for me?

ASSISTANT: Sure, please provide your source and destination.

USER: Thank you, I want to travel from IAD to LAX.

ASSISTANT: Ok, when do you want to travel?

USER: My departure is on Dec 27 and please book my return ticket on Dec 29.

ASSISTANT: Ok, Do you prefer direct flight or connected flight?

USER: I will prefer connecting flight.

ASSISTANT: Ok, please wait.

USER: Sure, take your time.

ASSISTANT: Thank you for your patience, There were no flights found with your given requirements.

USER: Oh! Sad to hear that. Anyway, I will find another alternative to complete my trip. Thank you for checking.

ASSISTANT: May I know your name?

USER: Sure, my name is Marry Harris.

ASSISTANT: Thank you for choosing us.

USER: Welcome.