You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I abet you?

USER: I would like to visit The Heritage Society in Houston to study about 19th century houses. Can you book me a ticket on the name Rachel Evans?

ASSISTANT: Sure. Do you have any specifications?

USER: Yes, I can afford up to 5000.

ASSISTANT: Let me know your planned dates.

USER: I will prefer a single connecting flight. My preferable dates are 08/29 and 08/31.

ASSISTANT: May I know your airport codes?

USER: Sure, I am travelling from DEN to HOU.

ASSISTANT: Please wait for a while.

USER: Ok.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

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

ASSISTANT: Thank you for reaching us.