You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Dennis Lopez.

ASSISTANT: How may I guide you today?

USER: I need to book a ticket to HOU for attending a meeting, can you please help me in booking from DEN?

ASSISTANT: Sure, I will help you with that. Can you please share your preferable journey dates?

USER: My preferred dates are from 07/13 to 07/15.

ASSISTANT: Please wait for a minute.

USER: Ok.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.