You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Kevin Hall here.

ASSISTANT: How can I help you?

USER: I want to meet a friend in IAH, can you please find a flight from DEN?

ASSISTANT: Your travelling dates please?

USER: My travelling dates will be from 01/13 to 01/15.

ASSISTANT: I am sorry no flights found on your route.

USER: Oh! That's fine. Thank you for checking.

ASSISTANT: Thank you for choosing us.

USER: You are most welcome.