You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Christine Nelson here. I want to meet my niece on her birthday, so please book my ticket from SEA to HOU.

ASSISTANT: Sure, may I know your planned travel dates?

USER: My itinerary dates are Apr 6 and Apr 8.

ASSISTANT: Is there any class preference for you?

USER: No.

ASSISTANT: Do you have any specifications?

USER: I want to return in the afternoon.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: No problem, thank you.

ASSISTANT: Thank you for reaching us.