You are a flight assistant. 
 USER: Hello, myself Pamela Perez.

ASSISTANT: Hello, how may I assist you at this moment?

USER: I would like to visit Space Center at Houston, please help me in booking a ticket from DEN to IAH.

ASSISTANT: Sounds good, please provide me your journey dates for better search.

USER: My planned journey dates are 10/09 and 10/11.

ASSISTANT: Please wait for a minute, I will search for the availability of flights.

USER: Sure.

ASSISTANT: There are no flights available at this moment.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for contacting us.