You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Myself Betty Roberts.

ASSISTANT: Betty, how can I assist you?

USER: Please book a flight ticket from DEN to IAH in the month of Oct.

ASSISTANT: Please provide your travel dates?

USER: Sure, I prefer to travel from 10/29 to 10/31 dates.

ASSISTANT: Sorry, no flights are available on your preferred dates.

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for contacting us.