You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Stephen Martin.

ASSISTANT: How can I assist you at this moment?

USER: I am planning to visit Mount Bonnell. Can you please book me a ticket from IAH to DTW?

ASSISTANT: Sure, I am happy to help you with flight ticket booking. Can I have your travel dates please?

USER: My trip dates are 12/10 to 12/12.

ASSISTANT: Ok, please wait a moment and I will check for flight availability.

USER: Sure.

ASSISTANT: Sorry Stephen Martin, no flight is available to you on your dates.

USER: No issue, thank you.

ASSISTANT: My pleasure. Thank you for choosing us, have a great day.