You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am planning to visit a NASA space center in Houston, so please book a flight ticket from DCA to HOU.

ASSISTANT: Sure, can you provide me with the itinerary dates please?

USER: I want to fly on July 22, return on July 24.

ASSISTANT: Is there any class preference?

USER: No.

ASSISTANT: May I know if you have any airline preference?

USER: I want normal cost airline.

ASSISTANT: Is there any time concern?

USER: No.

ASSISTANT: Would you prefer any connection limit?

USER: I want a flight with one connection.

ASSISTANT: May I know your name please?

USER: My name is Linda Wilson.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: United Airlines with flight 1009 is providing service on your route with single connection and cost is 100.

USER: Ok, proceed to booking.

ASSISTANT: Your ticket is booked in the economy class where departure DCA 0:00 AM July 22 and arrival HOU 5:00 AM July 24.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.