You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I guide you today?

USER: I am Betty King. Please book me a ticket from HOU to LAS to meet my family.

ASSISTANT: Sure, can you provide your travel dates?

USER: I have planned to travel on Nov 16th and return on Nov 18th.

ASSISTANT: Do you need a stopover?

USER: Yes, I prefer connecting flight.

ASSISTANT: Is there any class preference for you?

USER: I am ok with any class.

ASSISTANT: At what time do you like to travel?

USER: I have planned to return at morning time.

ASSISTANT: Do you have any other specifications?

USER: No, I don't have any specifications.

ASSISTANT: Sorry, there are no flights on your required dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for reaching us.