You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how can I assist you?

USER: I am Elizabeth Rodriguez and I want to book a flight ticket to go for death valley adventure at Denver, CO - DEN. Can you hold me a flight ticket with airfare 200?

ASSISTANT: Sure, when are you planning to travel?

USER: My preferable journey dates are 01/18 - 01/20.

ASSISTANT: Please provide your origin airport code.

USER: Sure, Orlando, FL - MCO is my departure airport code.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no flights found based on your details.

USER: Ok, not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your service.