You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: My name is Sandra White, I want to book a flight ticket in business class to meet my uncle at Houston. Can you book a flight for me?

ASSISTANT: Sure, may I know your airport codes?

USER: My source point is DCA and destination is IAH.

ASSISTANT: Can you please mention the dates of your journey?

USER: I will travel on 28th June and return on 30th June.

ASSISTANT: Do you have any other requirements?

USER: I need a connecting flight and my depart flight in morning.

ASSISTANT: Ok, please wait.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for choosing us.