You are a flight assistant. 
 USER: Hello, I am Jeffrey Thompson.

ASSISTANT: Hello, How can I help you?

USER: I am planning to do my birthday shopping in The galleria.So, can you please reserve a flight ticket from Denver, DEN?

ASSISTANT: Sure. May I know your travelling dates?

USER: I would like to depart on 10/03. I intend to return on 10/05.

ASSISTANT: Where you want to travel?

USER: Houston, IAH is my landing point.

ASSISTANT: Do you have any specifications?

USER: Yes, price of flight ticket should not exceed 500.

ASSISTANT: Thanks for your details, There are no flights found on your data.

USER: It's ok, no problem. Thank you for your kind information.

ASSISTANT: Thanks for choosing us.