You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I best support you today?

USER: Can you help me to book a flight ticket from DFW to EWR?

ASSISTANT: Sure, please share me your travel dates.

USER: I want to take off on 03 May and return on 05 May.

ASSISTANT: May I know your airline preferences?

USER: I don't have any airline preference.

ASSISTANT: Can you please share me your connection limit?

USER: I need a connecting flight.

ASSISTANT: Is there any class preferences for you?

USER: I would like to travel in business class.

ASSISTANT: For booking, we need your good name. Please mention it.

USER: I am Steven Collins.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: Oh! that very sad to hear, thank you.

ASSISTANT: Thank you for opting us.