You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you please help me to book a flight in business class to reach Houston?

ASSISTANT: Sure, may I know your airport codes please?

USER: Sure, my airport codes are CLT - IAH.

ASSISTANT: Can I have your planned travel dates please?

USER: My planned dates are on May 12th to 14th.

ASSISTANT: May I know your name please?

USER: Sure, my name is Rachel Jones.

ASSISTANT: Do you have any connection preference?

USER: Yes.

ASSISTANT: May I know your other requirements?

USER: I don't have.

ASSISTANT: I found an economy class in Delta airlines with fare 100 and it has single connection. Can I book your ticket?

USER: Please check for the business class.

ASSISTANT: Rachel Jones, no flights has been found on your preferences.

USER: No issues, thank you.

ASSISTANT: Thank you for choosing us.