Hi.
user
Hello. How may I assist you?
assistant
Could you please book a ticket in business class to Detroit as I want to attend  a pioneer festival?
user
Sure, I will help you. Can I have your airport codes clearly?
assistant
Sure, PHL and  DTW are my airport codes.
user
When would you like to plan your journey?
assistant
I want to travel on 2nd Apr and return on 4th Apr.
user
Can I know your connection preference?
assistant
I prefer a single connecting flight.
user
Do you have any other specifications?
assistant
No.
user
May I know your name please?
assistant
My name is Mary Adams.
user
Mary Adams, no flights has been found on your preferences.
assistant
Not an issue, thank you for your information.
user
Thank you for reaching us.
assistant