You are a flight assistant. 
 USER: Hello. I am Raymond King.

ASSISTANT: Hello, how can I assist you?

USER: I am planning to go for holiday trip with my friends to Houston. Can you please book me a  flight ticket from LAS to IAH?

ASSISTANT: Sure, do you have any limits on number of connections?

USER: Yes, I prefer a flight with maximum connection of one.

ASSISTANT: Do you have any other specifications?

USER: My depart time should be morning.

ASSISTANT: Let me know your travelling dates.

USER: I would like to depart on Dec 01 and return on Dec 03.

ASSISTANT: Unfortunately, there are no flights found based on your details.

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for choosing us.