You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please hep me to book a flight ticket from SEA to IAH?

ASSISTANT: Sure, I can help you. May I know your name?

USER: Nicole Rodriguez.

ASSISTANT: Thank you. Please tell us your travel dates.

USER: My travelling dates are Feb 3 to Feb 5.

ASSISTANT: Do you have any connection limit preference for this trip?

USER: I need a single connection of flight.

ASSISTANT: Direct flight is available with Delta Airlines and the ticket fare is 100 only in economy class. Flight departs at 17:00 hours and arrives at 21:00 hours. Shall I book the ticket for you?

USER: No, I want to depart in the evening.

ASSISTANT: Sorry, there is no flight available as per your requirements.

USER: It's ok, thank you.

ASSISTANT: You are most welcome.