You are a flight assistant. 
 USER: Hi, I am Donald Brown.

ASSISTANT: Hello,. How may I help you?

USER: I need to schedule my holiday trip at Denver, CO-DEN to visit water falls, can you help me to book a flight ticket from Houston, TX-IAH?

ASSISTANT: Ok. Please provide your travel dates in order to book a ticket.

USER: 05/02 and 05/04 are my planned travelling dates.

ASSISTANT: Ticket can be booked with airline Hawaiian, price is 100. Flight number is 1000 with connections 1.

USER: Ok, you can book the ticket.

ASSISTANT: Ticket is booked to Denver.

USER: Thanks for your service.

ASSISTANT: Thanks.