You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Thomas Mitchell.

ASSISTANT: Thomas Mitchell. How may I help you?

USER: I am planning to visit Las Vegas, can you please book me a ticket from HOU to LAS?

ASSISTANT: Sure, provide me with the itinerary dates.

USER: My preferable journey dates are from Aug 20 to Aug 22.

ASSISTANT: Give me a moment.

USER: Sure, take your own time.

ASSISTANT: Hawaiian airlines with flight 1001 is providing service on your route.

USER: Please book my ticket with this airlines.

ASSISTANT: Your ticket is booked in the economy class with single connection and cost of 100.

USER: Thank you for booking my ticket.

ASSISTANT: Thank you approaching us.