You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you today?

USER: I want to book an business class flight ticket to make my trip. Can you help me?

ASSISTANT: Sure, I will help you that. Can you please provide your origin and destination airport codes for booking?

USER: Thank  you. IAH and PHL are my airport codes.

ASSISTANT: Ok, may I know your departure and return dates of travelling?

USER: Dec 01st and 03rd are my travelling dates.

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

USER: Brenda Turner.

ASSISTANT: Any class preference do you have?

USER: I have already mentioned it above.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Any other specifications do you have?

USER: No.

ASSISTANT: Please be on hold to check the flights.

USER: Ok.

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

USER: No issue. Thank you for the information.

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