You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you please book a flight ticket from IAH to PHL?

ASSISTANT: Sure, may I know your name please?

USER: Thank you. Myself Jonathan Nelson.

ASSISTANT: May I know your planned travelling dates please?

USER: I have planned my travel dates as Sept 25 and Sept 27.

ASSISTANT: May I know your class preference please?

USER: I would prefer business class to travel.

ASSISTANT: May I know your connection limit please?

USER: I am looking for single connecting flight so please check with that.

ASSISTANT: Sorry Nelson, there is no flight found on your required business class.

USER: Oh! It is sad to hear. Anyway, thank you for your time.

ASSISTANT: Thank you for reaching us.

USER: Most welcome.