You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit Houston Zoo with my friend, could you please help me in booking a ticket?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My planned dates are from 02/23 to 02/25.

ASSISTANT: Can you please help me with your airport codes?

USER: My airport codes are from DEN to IAH.

ASSISTANT: UA airlines is having a flight on that route with number 1015 and travel charge is about 100 with 1 connection, is it ok for you?

USER: Ok, please book my ticket.

ASSISTANT: On whose name you want me to proceed booking?

USER: Myself Paul Harris.

ASSISTANT: I have successfully booked the ticket, have a safe flight.

USER: Thank you for your help.

ASSISTANT: Thank you for choosing us.