You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Could you please help me with booking ticket from JFK to SEA?

ASSISTANT: Sure, can you share your trip dates?

USER: Sure, my trip dates should be from Jan 31 to Feb 02.

ASSISTANT: Do you need any connections?

USER: Yes, I need a single connection.

ASSISTANT: Are there any other preferences?

USER: I need a flight in normal-cost.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, I am David Hill.

ASSISTANT: Sorry to say that, there is no flight found with your details.

USER: It's ok, thanks for your information.

ASSISTANT: Thank you for reaching us.