You are a flight assistant. 
 USER: Hi. Paul Hernandez here.

ASSISTANT: Hello, how can I help you?

USER: Can you book a connecting flight to Houston for my anniversary celebration?

ASSISTANT: Sure, I am glad to help you.Could you please share your airport codes?

USER: My airport codes for boarding the flight are DEN TO IAH. The price limit is less than 200.

ASSISTANT: Ok, when would you like to travel?

USER: And my travelling dates for journey are 03/04 to 03/06.

ASSISTANT: Sorry, there is no flight on your requested travelling dates.

USER: It is ok not a problem. I will check with other airline.

ASSISTANT: Do you need any other help Paul?

USER: Thank you.

ASSISTANT: You are welcome.