You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you today?

USER: I would like to travel from ATL to EWR. Can you please help me?

ASSISTANT: Sure, will you please provide your preferable dates of travelling?

USER: My travel dates are from 09/05 to 09/07.

ASSISTANT: On whose name I have to book the flight ticket?

USER: Dorothy Hill.

ASSISTANT: Do you have any connection limit?

USER: I want a single connection.

ASSISTANT: Would you like to travel in a business class or in an economy class?

USER: I would prefer business class.

ASSISTANT: Is there any other preferences do you have?

USER: No.

ASSISTANT: Please wait a moment to check the flights on your route.

USER: Ok.

ASSISTANT: Unfortunately there are no flights running on your route with your required preferences.

USER: It's ok, thank you.

ASSISTANT: Thank you for reaching us, have a great day.