You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I want to book a business class flight to meet my parents. Can you book a flight for me?

ASSISTANT: Let me know your travelling dates.

USER: I will travel on Jan 29 and return on Jan 31.

ASSISTANT: Can I know your airport codes?

USER: My source point is IAH and my destination is PHX.

ASSISTANT: Do you have any preference?

USER: I need a connecting flight.

ASSISTANT: Let me know your name.

USER: My name is Stephanie Phillips.

ASSISTANT: Sorry, no flights found for your travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you.