You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Can you please book the ticket from HOU to DEN? As I'm planning to meet my old friend.

ASSISTANT: Yes, can you tell me your dates of travel?

USER: Sure, my planned departure and return travel dates are 3rd and 5th of May.

ASSISTANT: Do you have any other preferences?

USER: Yes, I prefer single connected flight.

ASSISTANT: Give me a moment.

USER: Sure, I'll wait for your response.

ASSISTANT: I have found an economy class ticket with a price of 200 and 1 connection.

USER: That's fine for me, you can proceed for booking.

ASSISTANT: Can I know your name for booking?

USER: My name is Sandra Campbell.

ASSISTANT: Your ticket has been booked.

USER: Thank you so much for your help.

ASSISTANT: Thank you for contacting us.