You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Nicholas Garcia. I would like to book a flight ticket from BOS to IAH. Could you please help me with booking a normal cost airline?

ASSISTANT: Sure, please share your planned travel dates.

USER: My travelling dates are 09/16 and 09/19.

ASSISTANT: Do you prefer any specific class?

USER: I need a business class.

ASSISTANT: Do you need any connection between your journey?

USER: I need a connecting flight. I regret my return date id 09/18.

ASSISTANT: We don't have any flight available on given dates by you.

USER: No worries, thank you for the information.

ASSISTANT: Thank you.