You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Lee.

ASSISTANT:  Thomas Lee. How can I help you?

USER: I want to book a ticket from DFW to HOU, will you help me?

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

USER: My travelling dates are on Nov 26 and Nov 28.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Do you have any preferences?

USER: I need a single halt.

ASSISTANT: United Airlines with flight 1002 is providing service on your route.

USER: You can proceed.

ASSISTANT: Your ticket is booked in the economy class with single connection.

USER: Thank you.

ASSISTANT: Thank you for approaching us.