You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Paul Williams.

ASSISTANT: How can I assist you?

USER: Can you please help me with booking a flight ticket from DEN to IAH?

ASSISTANT: Ok, may I know your travelling dates?

USER: Travel dates are 01/30 and 02/01.

ASSISTANT: Please wait.

USER: Ok.

ASSISTANT:  Here is a connecting flight with fare 100 and 1007 as flight number in economy class. Shall I proceed with booking?

USER: Please do not proceed with booking I need a direct flight.

ASSISTANT: Sorry, no flights found on your route.

USER: Ok. Thank you.

ASSISTANT: Most welcome.