You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Pamela Hill. I am planning to take my children's to Denver Zoo at Denver, so please help me in booking a flight ticket.

ASSISTANT: Sure, please share me your travelling dates?

USER: I would like to fly on 07/11 and return on 07/13.

ASSISTANT: Can I know your airport codes?

USER: My source is Los Angeles, CA - LAX and destination code is CO - DEN.

ASSISTANT: Thanks for your details. We found 1001 UA airline with single connection and price of 300.

USER: You can proceed to booking.

ASSISTANT: Your ticket has been booked.

USER: Thank you for your help.

ASSISTANT: Thank you for reaching us.